Locke can't be blocked by creatures with greater power.
Mug — Whenever Locke attacks, each player
mills (To mill a card, a player puts the top card of their library into their graveyard.) a card. If a land card was
milled this way, create a
Treasure token
(A Treasure is an artifact with "
, Sacrifice this artifact: Add one mana of any color."). Until end of turn, you may cast a spell from among those cards.