Svella, Ice Shaper + Roxanne, Starfall Savant + Agatha of the Vile Cauldron + Umbral Mantle

Prerequisites

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Steps

1. 1Activate Svella's first ability by paying and tapping it, creating a Icy Manalith token.
2. 2Activate the Icy Manalith token by tapping it, adding .
3. 3Roxanne's second ability triggers, adding .
4. 4Activate Svella by paying and untapping it, giving it +2/+2 until end of turn.
5. 5Repeat.

Effects

• Infinite tapped Icy Manalith tokens
• Infinitely large creature until end of turn