Maro

The original hand-as-stat creature, and the reference point for every variable-body design that followed. Tying power and toughness to your hand size inverts the usual deckbuilding tension: cards in hand are normally potential energy waiting to be spent, but here every card you hold is a stat point already on the board, so casting spells actively shrinks the threat. That friction is the entire balancing act. A fresh hand makes a giant; an empty one makes a corpse. The design forces a discipline most green fatties never demand, asking you to weigh whether the next play is worth the toughness it costs, and rewarding hands you can refill faster than you deploy. It draws out a tension green has flirted with for decades: raw size versus card advantage, here collapsed so the two resources become literally the same number. Later iterations would sand off the rough edges (Multani and the more forgiving graveyard-counting builds soften the all-eggs-in-one-hand fragility), but the structural idea is intact from the start. Read your hand, read the board, decide what your creature is allowed to be this turn.