Jungle Troll

A two-color regenerator built to advertise its mana base. The body is small and the regeneration is the whole pitch: pay red or green and it shrugs off lethal damage, which means it survives any removal that destroys it or block where you can match the activation. The dual-color shielding is the design idea, not redundancy for its own sake. Spend an open mana of either color and it lives, so whichever half of your Gruul mana you have untapped at the wrong moment is enough; you are never caught holding the wrong land. Regeneration was the era's primary survivability keyword before indestructible existed, and stapling two activations onto one creature was a way to make a fragile attacker stick around through repeated combat without committing extra cards to protecting it. The cost of the design is everywhere in the stat line: a 2/1 that wants to attack and regenerate spends mana every turn it does both, so the body stays cheap and the upkeep on keeping it alive scales with how aggressively you use it. That tension (a creature that defends itself only as fast as you can feed it) is the honest read on what regeneration cost in the mana economy of its time.