Quickbeam, Upstart Ent + Devoted Druid + Ant Queen + Xenograft

Quickbeam, Upstart Ent

Devoted Druid

Ant Queen

Xenograft

How it works

1. Activate Devoted Druid's first ability by tapping it, adding .
2. Activate Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it.
3. Activate Devoted Druid's first ability by tapping it, adding .
4. Activate Ant Queen by paying 1, creating a 1/1 Insect creature token.
5. When the Insect enters the battlefield as a Treefolk due to Xenograft, Quickbeam triggers, giving Devoted Druid and up to one other creature +2/+2 until end of turn.
6. Activate Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it.
7. Repeat.

This clever engine turns Ant Queen into an infinite token machine by leveraging Xenograft to reclassify every new Insect as a Treefolk the moment it hits the board. That sudden arrival triggers Quickbeam, Upstart Ent to pump your creatures, granting vital power and trample to keep your advancing army threatening. Meanwhile, Devoted Druid provides the mana engine to fuel the Queen's ability by repeatedly tapping and untapping itself through its own -1/-1 counter ability, neatly sidestepping lethal damage thanks to the massive toughness boosts from Quickbeam's cascading triggers.