Bast, Panther Goddess
Read the gate first, because it inverts how you'd normally value an indestructible 4/4 with reach and trample: this body neither attacks nor blocks until you control three or more creatures, so on an empty board it is a wall of keywords with nowhere to point them. That restriction reframes the whole package from a resilient standalone beater into a payoff for going wide, and it earns its keywords by aiming them at exactly the decks that can meet the condition. The attack trigger compounds the same incentive: whenever you attack, one chosen attacker grows by the number of creatures you control, so this is not a board-wide anthem but a spotlight buff that funnels the width you've assembled into a single lethal swing. Committing more bodies feeds the same count twice: it unlocks combat, then decides how large that spotlight gets. Indestructibility does real work in this shell rather than idle stat-padding, but it is worth being precise about the limit: a sweeper that clears your other creatures does leave this one on the battlefield, yet the moment your count drops below three it can't attack or block, so it survives while going dormant, waiting for you to rebuild the crowd it needs. The result is a green-white creature engineered entirely around the arithmetic of the attack step: inert alone, dominant in numbers, and priced in the bodies you are willing to keep on the table.
