Activate Crystalline Crawler using Heroes' Bane's ability by paying {2}{G}{G}, putting a number of +1/+1 counters on Crystalline Crawler equal to its power.
Activate Crystalline Crawler's first ability four times by removing four +1/+1 counters from it, adding {2}{G}{G}.
Repeat.

Infinite colored mana

Infinite +1/+1 counters on a creature

Agatha's Soul Cauldron

Heroes' Bane

Crystalline Crawler

Activate Necrotic Ooze using Heroes' Bane's ability by paying {2}{G}{G}, putting at least five +1/+1 counters on it.
Activate Necrotic Ooze using Crystalline Crawler's first ability four times by removing four +1/+1 counters from it, adding {2}{G}{G}.
Repeat

Necrotic Ooze

Cast Mimeoplasm by paying {4}{B}{G}{U}
As Mimeoplasm enters, exile Ramos, Heroes' Bane, and two additional creature cards from your graveyard, causing Mimeoplasm to enter with twelve +1/+1 counters on it.
Activate Mimeoplasm by paying {2}, causing it to become a copy of Ramos with this ability.
Activate Mimeoplasm using Ramos's ability by removing five +1/+1 counters from it, adding {W}{W}{U}{U}{B}{B}{R}{R}{G}{G}.
Activate Mimeoplasm by paying {2}, causing it to become a copy of Heroes' Bane with this ability.
Activate Mimeoplasm using Heroes' Bane's ability by paying {2}{G}{G}, doubling the number of +1/+1 counters on it.
Repeat from step 3.

Combos with "Heroes' Bane"