Experiment Kraj + Devoted Druid + Benevolent Hydra

Experiment Kraj

Devoted Druid

Benevolent Hydra

How it works

1. Activate Experiment Kraj by tapping it, putting two +1/+1 counters onto Devoted Druid.
2. Activate Experiment Kraj using Devoted Druid's last ability by putting a -1/-1 counter on itself, untapping it.
3. Activate Experiment Kraj's own ability, putting two +1/+1 counters on itself.
4. Remove the -1/-1 counter and one of the +1/+1 counters from Experiment Kraj as a state-based action.
5. Repeat steps 2 through 4 any number of times, resulting in any number of +1/+1 counters on Experiment Kraj.
6. Activate Experiment Kraj using Devoted Druid's last ability by putting a -1/-1 counter on itself, untapping it.
7. Activate Experiment Kraj using Devoted Druid's first ability by tapping it, add .
8. Repeat steps 6 and 7 any number of times.
9. You may also activate Experiment Kraj's own ability any number of times instead of step 7, putting any number of +1/+1 counters onto creatures.

This clever sequence hinges on Experiment Kraj assuming the combined activated abilities of its peers while amplifying its own potential. With a +1/+1 counter placed on Devoted Druid, Experiment Kraj gains the ability to untap by placing a -1/-1 counter on itself, a self-correcting loop that is supercharged by Benevolent Hydra's replacement effect increasing the counter yield. State-based actions continually clean away the -1/-1 counters alongside the surplus +1/+1 counters, leaving Experiment Kraj free to endlessly untap, generate infinite green mana through Devoted Druid's mana ability, and scatter limitless +1/+1 counters across your board.