Urban Daggertooth + Pyrohemia + Gemstone Array

Urban Daggertooth

Pyrohemia

Gemstone Array

How it works

1. Activate Pyrohemia by paying , dealing 1 damage to each creature and each player.
2. Urban Daggertooth triggers, putting a +1/+1 counter on Urban Daggertooth and a charge counter on Gemstone Array.
3. Activate Gemstone Array's second ability by removing a charge counter from it, adding .
4. Repeat.