Quickbeam, Upstart Ent + Devoted Druid + Spawnsire of Ulamog + Conspiracy

Quickbeam, Upstart Ent

Devoted Druid

Spawnsire of Ulamog

Conspiracy

How it works

1. Activate Spawnsire of Ulamog's first ability by paying 4, creating two 0/1 Eldrazi Spawn creature tokens.
2. When the Eldrazi Spawns enter the battlefield as Treefolk due to Conspiracy, Quickbeam triggers twice, giving Devoted Druid and up to one other creature +4/+4 until end of turn.
3. Activate Devoted Druid's first ability by tapping it, adding .
4. Activate Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it.
5. Repeat from step 3 three additional times.
6. Repeat from step 1.

By using Conspiracy to name "Treefolk," you turn every creature you own—including the Eldrazi Spawn tokens created by Spawnsire of Ulamog—into a Treefolk, which elegantly weaponizes Quickbeam, Upstart Ent's triggered ability whenever they enter the battlefield. This massive pump gives Devoted Druid the necessary leeway to safely tap for green mana and untap itself by placing -1/-1 counters, generating infinite green and colorless mana to feed right back into Spawnsire of Ulamog's token-making ability. The result is an endless loop of blooming Ents and scurrying Spawn that completely overwhelms the board with infinite resources and infinitely large creatures.