Grollub

The penalty clause is the entire idea: every point of damage this creature absorbs becomes life for each opponent. It is a downside-as-feature experiment from a set fond of attaching drawbacks to aggressive bodies, and how the clause is worded matters more than the rate. The trigger keys on the creature being dealt damage, which means combat offers no refuge: trade it in a fight, chump-block, or let it eat a burn spell, and each opponent gains that much life every time. Because the rider is keyed to damage specifically, though, destruction and sacrifice effects that bypass damage leave it untouched. Bounce it, sacrifice it, or wrath it before damage resolves and the trigger never fires. That distinction inverts the usual instinct to treat a creature's toughness as a shield: here toughness is the liability, since absorbing damage is precisely the thing the card punishes. The friction is the whole point. The body is priced like an unconditional beater, and the life-gain rider keeps it from being one, asking the player to route the creature around damage rather than into it, to deal damage with it rather than soak damage on it.