Loader, Bionic Powerhouse

Trample (This creature can deal excess combat damage to the player or planeswalker it’s attacking.)

Whenever Loader, Bionic Powerhouse attacks, it gains +4/+0 until end of turn.

Whenever Loader, Bionic Powerhouse attacks alone, you may pay {2}{r}, if you do, creatures your opponents control block this turn if able, and you choose how those creatures block.