Giant Ambush Beetle

Haste is the load-bearing word, because the entering trigger only pays out if the body can swing the same turn it dictates the block. The play pattern is a one-card combat instruction: drop it, point the trigger at whatever creature is in your way, and force that creature to block the Beetle itself this turn if it can. Used as a lane-clearer, it pulls a defender out of position by committing it to a fight you chose, opening the rest of your attack. The "if able" clause is the honest restriction: against an opponent whose only creature is already committed elsewhere, or who has nothing untapped to involve, the effect does nothing, so reading the board before it resolves is the whole exercise. Note the leash here too: the target must block the Beetle, not some larger attacker, so this is not a remote-removal trick that escorts a deathtouch swinger into a guaranteed trade. The 4/3 body is fragile enough that forcing the wrong creature to block backfires when you misjudge what your opponent will throw under it, which is exactly the tension that makes this a decision rather than a freeroll. The hybrid pip in an otherwise Jund cost marks it as a shard-block creature built to do one tempo-positive thing cleanly, picking a fight on your terms rather than scaling into the late game.