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A fun deck I came up with for Arena, relies on getting Kaya's ultimate off and from that being able to cast Karn's Temporal Sundering for free every upkeep, resulting in infinite turns.
It usually doesn't work, but I'll generally rely on building a bit of a pillow fort with Valkmira, ramping, and boardwiping when necessary. If I can get Vorinclex to stay on the field for a turn, I'll throw out a Sundering, then cast Kaya and ult her thanks to Vorinclex. It's amusing when it goes off.
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