mtg mind card Of One - Ikoria: Lair of Behemoths #60 (English) You may reveal a noncreature Mind into Matter | Secrets

It is proactive, utility, and value and so ticks a lot of cube boxes

Proliferate works well here not only by proliferating the growth counters on Simic Ascendancy, but also the counters other creatures, too

Even better, when Polukranos or ANY OTHER nontoken Hydra you control dies, you get to make two more 3/3 Hydras, one with lifelink and one with reach

It doesnt get better if you wait

Iona, Shield of Emeria Banned in Brawl Iona, Shield of Emeria currently appears on the Commander ban list

The first one gives you a one-time army in a can usually via enters the battlefield effects from creatures like Avenger of Zendikar and Hornet Queen