Manifold Mouse

What a two-drop like this buys you is a combat step you get to retune each turn: double strike when the board is clear and you want to close, trample when a chump blocker is the last thing between your team and lethal. The choice is the design point, not either mode on its own. Note the target line: any Mouse you control, not the Mouse itself, which is what lets the ability point at whichever attacker most wants the buff on a given turn. Offspring compounds this in a way most keyword-granting bodies cannot. Spend the extra two mana up front and you get a second small body carrying the same beginning-of-combat trigger, so casting it a second time (or copying it) stacks handouts rather than duplicating a static effect. A second lord or evasion-granter is often redundant; a second repeatable combat-step buff is a genuine escalation, because now two Mice can gain double strike or trample each turn. That is the wrinkle: the card was built so its own reproduction scales the payoff instead of stalling it. It rewards a wide, low-curve aggressive plan where combat-damage multipliers always find a target, and it punishes boards of small creatures left alive on the assumption they can trade or chump. The 1/2 body will not win a fight, but that was never the job; the job is to be the recurring source of the damage math that finishes it.