The Tenth Doctor + Mana Echoes + Festering March + Ovika, Enigma Goliath

Prerequisites

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Steps

1. 1Activate The Tenth Doctor by paying , removing all time counters from Festering March.
2. 2Festering March triggers, causing you to cast it from exile without paying its mana cost.
3. 3Ovika triggers, creating a number of creature tokens.
4. 4When the creature tokens enter, Mana Echoes triggers, adding for each creature you control that shares a creature type with the token for each trigger.
5. 5Resolve Festering March.
6. 6Repeat.

Effects

• Infinite colorless mana
• Infinite creature ETB
• Infinite creature tokens with haste
• Infinite magecraft triggers
• Reduce the toughness of creatures opponents control to 0