Requires

Kitsa, Otterball Elite must be on the battlefield. Join Shields must be in hand. Kitsa does not have summoning sickness. Kitsa has power 2 or greater. Creatures you control can tap to produce at least . Mana needed:

Steps

1. Cast Join Shields by paying .
2. Kitsa's prowess ability triggers, giving it +1/+1 until end of turn.
3. Holding priority, activate any number of creatures by tapping them, adding at least .
4. Activate Kitsa's second ability by paying and tapping it, copying Join Shields.
5. Resolve the copy of Join Shields, untapping all creatures you control.
6. Repeat from step 3.

Results