Llanowar Augur

The whole design lives inside one strange restriction: the pump is bolted to your own upkeep, the phase furthest from where a combat trick wants to be. Sacrifice this for +3/+3 and trample and you grant the buff before you have even drawn for the turn, which means the opponent gets to react across your draw, main phase, and the beginning of combat before blockers are even declared. The bonus lasts only until end of turn, so this is an attack you commit to early in the same turn you intend to swing: you announce which creature is about to turn lethal, then live with the announcement through every step that follows. That timing clause is what turns an otherwise generous one-mana effect into something you solve rather than something you simply cast. A 0/3 body gives the thing the patience to survive early aggression while it waits for its narrow window, and the trample makes the eventual swing matter against a chump rather than just bigger. It reads as a curiosity from an era fond of testing how far an ordinary effect could bend when chained to an unusual activation rule, the kind of card built to be cracked open rather than slotted. The reward for working inside the constraint is real (a permanent that converts into reach and evasion for a single green), but the upkeep lock means the play is never reactive, never a surprise. It is always telegraphed, and the whole exercise is making that telegraph pay anyway.