Cankerbloom

Green rarely gets flexible removal on this small a body, and the trick is that all three modes share one cost: pay a mana, sacrifice the fungus. Because the ability carries no tap symbol and no summoning-sickness constraint, the answer is available the moment the mana is, so the same 3/2 can attack into a race one turn and detonate an artifact on the crackback the next. What you gain is the freedom to choose the mode after you know what the board demands: artifact answer, enchantment answer, or proliferate spike, decided on the spot. That third mode is what separates this from the long line of green naturalize-on-a-stick creatures. Proliferate converts a body headed for a trade into a counter advance for anything the deck already tracks (planeswalker loyalty, +1/+1 counters, poison, charge counters). The sacrifice is the whole balancing act: this is not a repeatable answer, it is a single well-timed one, and spending it to destroy an artifact means it can no longer proliferate later. The design also resolves a real color-pie tension. Green wants incidental artifact and enchantment removal but should not get it for free at will; bundling every mode behind a one-shot sacrifice keeps the flexibility honest without narrowing any single line, since the cost of choosing is losing the creature and every other option along with it.