Spawnsire of Ulamog + Illusionist's Bracers

Spawnsire of Ulamog

Illusionist's Bracers

How it works

1. Activate Spawnsire of Ulamog's first ability by paying 4.
2. Illusionist's Bracers triggers, copying Spawnsire of Ulamog's first ability.
3. Resolve the copy of Spawnsire of Ulamog's first ability and Spawnsire of Ulamog's first ability, creating four Eldrazi Spawn tokens with "Sacrifice this creature: add C to your mana pool".
4. Activate the four Eldrazi Spawn tokens's abilites by sacrificing the Eldrazi Spawn, adding CCCC.
5. Repeat.