Xavier Sal, Infested Captain + Experiment Kraj + Devoted Druid + Vizier of Tumbling Sands

Xavier Sal, Infested Captain

Experiment Kraj

Devoted Druid

Vizier of Tumbling Sands

How it works

1. Activate Experiment Kraj using Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it.
2. Activate Xavier Sal's first ability by tapping it and removing a -1/-1 counter from Experiment Kraj, creating a copy of any creature token you control.
3. Activate Experiment Kraj using Vizier of Tumbling Sands's ability by tapping it, untapping Xavier Sal.
4. Repeat.

This clever loop relies on Experiment Kraj acquiring the activated abilities of every creature sharing its space with a +1/+1 counter. With Devoted Druid's untap ability grafted onto it, Experiment Kraj can repeatedly untap itself at the cost of a -1/-1 counter, while Vizier of Tumbling Sands lets it untap Xavier Sal, Infested Captain. Xavier Sal then uses those accumulated -1/-1 counters as fuel to populate your board, letting you continuously leverage your tokens and repeat the cycle.