Combo: Infinite Mana To Direct Damage
Animate Dead + Niv-Mizzet, Dracogenius + Worldgorger Dragon
Infinite Mana Loop:
1. Animate Dead targeting Worldgorger Dragon.
2. Worldgorger Dragon enters the battlefield, triggering it's ability to exile all other permanents (including Animate Dead).
3. Exiling Animate Dead sacrifices Worldgorger Dragon.
4. Worldgorger Dragon goes to the graveyard, triggering the return of exiled cards.
5. When lands are returned, they are untapped.
6. (Repeat) Animate Dead returns, triggering ETB, targeting Worldgorger Dragon.
Use infinite mana to activate Niv-Mizzet, Dracogenius ability to do damage to target creatures or players.
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Combo: Infect Damage
Moltensteel Dragon + Scion of the Ur-Dragon + Skithiryx, the Blight Dragon
1. Activate Ur-Dragon ability, targeting Skithiryx, the Blight Dragon.
2. Activate Ur-Dragon ability, targeting Moltensteel Dragon.
3. Let second ability resolve. Ur-Dragon is now Moltensteel Dragon.
4. Pay 12 life or 6 red mana to pump +6/+0 onto Ur-Dragon.
5. Let first ability resolve. Ur-Dragon is now Skithiryx, the Blight Dragon.
6. Swing for 10 poison/infect damage. This kills the opponent.
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Combo: Commander Damage
Dragon Tyrant + Moltensteel Dragon + Scion of the Ur-Dragon
1. Activate Ur-Dragon ability, targeting Dragon Tyrant.
2. Activate Ur-Dragon ability, targeting Moltensteel Dragon.
3. Let second ability resolve. Ur-Dragon is now Moltensteel Dragon.
4. Pay 10 life or 5 red mana to pump +5/+0 onto Ur-Dragon.
5. Let first ability resolve. Ur-Dragon is now Dragon Tyrant (6/6 +5/+0).
6. Swing for 22 commander damage with Dragon Tyrant's double-strike.
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Combo: Card Draw To Direct Damage
Curiosity + Niv-Mizzet, the Firemind
1. Tap Niv-Mizzet, the Firemind to draw a card.
2. Triggers Niv-Mizzet, the Firemind ability, deal 1 damage to opponent.
3. Triggers Curiosity, draw a card.
4. (repeat) Triggers Niv-Mizzet, the Firemind ability, deal 1 damage to opponent.
5. Repeat until content with damage done. (Curiosity says "may draw").
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Combo: Infinite Attacks - Savage Ventmaw Version
Aggravated Assault + Savage Ventmaw
1. Attack with Savage Ventmaw.
2. Trigger Savage Ventmaw ability, add 3R3G mana to the pool.
3. Use Aggravated Assault ability, costing 3+2R. Untap creatures, including Savage Ventmaw.
4. (repeat) Attack with Savage Ventmaw.
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Combo: Infinite Recur to Direct Damage.
Dragon Tempest + Scion of the Ur-Dragon + Bladewing the Risen + Animate Dead.
1. Tempest and Scion on play.
2. Activate Ur-Dragon ability, targeting Bladewing.
3. Original Bladewing go to grave, Ur-Dragon becomes Bladewing copy.
4. Cast Animate Dead on Original Bladewing in grave.
5. Original Bladwing Enters the Battle Fields, put 2 triggers on stack ( tempest & himself ).
6. State based acton checked : Legend rule ( 2 Bladewing on play, choose the Original Bladewing (reanimated) to die )
7. Triggers resolve, deal 1 damage from tempest and return target dragon card from grave to play, targeting Original Bladewing.
8. Repeat