Muktol

I would rather use something like [[Angel's Feather]] or [[Chalice of Life]] instead of [[Cleric Class]] because this deck seems to care more for the quantity of lifegain rather than the quality.

What about some proliferate cards? [[Contagion Clasp]], [[Karn's Bastion]], [[Planewide Celebration]], [[Tezzeret's Gambit]], [[Evolution Sage]], [[Grateful Apparition]], [[Thrummingbird]], or something like [[Pledge of Unity]]/ [[Unbreakable Formation]]
I guess that [[Contagion Engine]] and [[Inexorable Tide]] will be out of budget.

[[Cherished Hatchling]] can create a small combo with [[Polyraptor]]

[[Obsidian Battle-Axe]] or [[Relic Axe]]?
[[Swiftfoot Boots]] instead of [[Leather Armor]]
Otherwise fast and cheap equipments like [[Bonesplitter]], [[Shuko]], [[Short Sword]], [[Bone Saw]], [[Cranial Plating]]

"then attack early and often"... I would rather try to use more cheaper creatures and less big finishers.
[[Changeling Outcast]] could be an option that would also be enable you to activate prowl of [[Morsel Theft]].
[[Skeletal Grimace]] could be an interesting enchantment, allowing you to safe one of your creatures from removal. Another option would be the use of cheap and fast equipment.

What about some 1-3 [[History of Benalia]] or [[Valiant Knight]]?
Adding black to the deck would allow you to use cards like [[Knights' Charge]], [[Aryel, Knight of Windgrace]] or [[Smitten Swordmaster // Curry Favor]]

General Advice: Try to identify cards that you like, and that you feel work very good in this deck, and cards that don't really life up to your hopes. Try to get the cards that really work at least 3 times, 4 would be better, and remove others that don't work instead. But, keep an eye on the mana-costs, you don't want to many of those expensive cards in your deck.

How do you want to continue with this deck? The world of magic is huge, and the options are nearly endless. Question is if you and your friends can agree on a legality that you all want to stick to, do you want to play at FNM (Friday Night Magic) events at your local game store, or participate in other events or small tournaments?

If you want to keep the budget low, take a look at pauper decks, those only use common cards and thus the total costs of the deck is normally rather low (In comparison)

What happened that MBC vanished? Middle of 2021 it made around 3% of the meta, depending on which site you looked at.

Wouldn't [[Cultivate]] or [[Harrow]] be better than Wayfarer's Bauble? Or do you prefer the colourless mana and costs that are divided over some turns (like the foretell mechanic)
[[Winding Way]] could also be an option, tough the question is what to remove for it.

[[Goblin Sledder]] is cheaper and you can sacrifice any number of creatures into him, rather than only 1 creature per [[Goblin Lookout]]. I would nevertheless try out the Lookout as the decks seems to pursue a swarm strategy rather than focusing on few, strong, beaters.

Personally I would try to swap 1-2 [[Goblin Sledder]] and add 1-2 [[Goblin Lookout]] and do some testgames. If the Lookout works as intended you can swap the remaining ones.

Oh and by the way: Classic, Age of Sigmar, The 9th Age or 40k?

Simple solution for the [[Goblin Lookout]] and [[Raid Bombardment]] problem: Sacrifice after declaring attackers. Your creatures will have power 2 or less when attacking, but when it's comes to the damage they deal, they get the +2 bonus from [[Goblin Lookout]].

[[Wildfire Elemental]] comes to my mind when using [[Impact Tremors]]/ [[Raid Bombardment]] , tough its no goblin and with 4 mana its questionable if its playable here with 18 lands.
[[Goblin Lookout]] could be used instead of [[Goblin Sledder]] and perhaps some 1-2 [[Hordeling Outburst]] instead of [[Dragon Fodder]]/ [[Krenko's Comman]].

You cannot make a copy of the spell (unless you cast another [[Insidious Will]] after the first), as you need to choose the target for the spell during casting, which means before putting it on the stack. Also copying a sorcery/ instant doesn't count as casting it. If you want the explanation in German, just say so.

115.1. Some spells and abilities require their controller to choose one or more targets for them. The targets are object(s) and/or player(s) the spell or ability will affect. These targets are declared as part of the process of putting the spell or ability on the stack. The targets can’t be changed except by another spell or ability that explicitly says it can do so.

The problem with [[Soul-Scar Mage]] is that [[Insidious Will]] only provides you with 2 copy of e.g. a [[Lightning Bolt]].
You cast [[Insidious Will]] (1O), targeting e.g. [[Lightning Bolt]]
You cast [[Insidious Will]] (2O), targeting 1O.
2O resolves, putting a copy of 1O on the stack (C1) and letting you choose new targets for the spell, which you choose to be 1O.
C1 resolves, putting a copy of 1O on the stack (C2) and letting you choose new targets for the spell, which you choose to be 1O.
CX resolves putting a copy of 1O on the stack (CX+1) and letting you choose new targets for the spell, which you choose to be [[Lightning Bolt]].
So in the end you have used cast 3 spells, 9 mana to create a loop and copy [[Lightning Bolt]] 2 times.


I don't think that this will be the case wickeddarkman, because copying a modal spell doesn't let you choose new modes, but the mode itself says that you may choose new targets for the spell.

707.10. To copy a spell, activated ability, or triggered ability means to put a copy of it onto the stack; a copy of a spell isn’t cast and a copy of an activated ability isn’t activated. A copy of a spell or ability copies both the characteristics of the spell or ability and all decisions made for it, including modes, targets, the value of X, and additional or alternative costs.

I don't think so, becaus a.) there are too few creatures for that and b.) [[Dingus Staff]] deals damage to the owner of the creatures, so basically you kill yourself when doing so.

Personally I would reduce the number of creatures that need to be equipped and add some with metalcraft instead. You have rather few equipment and equipping every creature on the board with one could be problematic. Also you creatures aren't really strong in general, even if they are equipped with a single equipment.
As for the equipment itself, personally I would focus on cheap and fast equipment: [[Bone Saw]], [[Bonesplitter]], [[Shuko]], [[Short Sword]], [[Cranial Plating]], [[Bladed Pinions]]. If you want your creatures to be a little bit more resistent to removal, you could throw in [[Swiftfoot Boots]]

You could also go for white red with [[Champion of the Flame]] and [[Galvanic Blast]]

Some additional suggestions:
[[Etched Champion]], [[Dispatch]], [[Auriok Sunchaser]], [[Auriok Edgewright]]

I've got the feeling that you have to many sources that have the ability to sacrifice something but to few creatures that you can actually sacrifice without loosing power. Undying, persist and unearth (ability, not the card) could be options to get some more cheap creatures that you can sacrifice twice. Token production would be the other way to go.
In my own black/ red sacrifice deck I'm using [[Butcher Ghoul]], [[Doomed Dissenter]], [[Myr Servitor]] and [[Hordeling Outburst]] with an additional [[Whisper Squad]], [[Dregscape Zombie]] and [[Molten Birth]] in the maybeboard.

I would remove [[Arboreal Grazer]] and [[Avacyn's Pilgrim]] for something more useful as they don't fit into your overall strategy of aggressive play.

"If placed on vault skirge it will also improve blight-priest"... not really. You would need something like [[Sanguine Bond]] for this to work instead of [[Marauding Blight-Priest]]. Blight-Priest let's your opponent lose 1 life for whenever you gain life, but it doesn't care if the lifegain is 1(time)x100(life) or 1x1 life. Other thing is when you gain 100x1 life.

[[Marauding Blight-Priest]] can turn you life gain into life drain. [[Vault Skirge]] is a good early beater with evasion and lifelink.
If you don't need the lesson-cards that you're able to get using [[Cram Session]] then [[Pristine Talisman]] or [Trespasser's Curse]] could be a replacement.
[[Witherbloom Pledgemage]] could be replaced with [[Ill-Gotten Inheritance]] tough this would loose you another creature

Metalcraft cards could work fine here: [[Carapace Forger]], [[Galvanic Blast]], [[Mirran Mettle]]