Arlyn, Orphan's Bane

Creatures with toughness 3 or greater cannot block Arlyn, Orphan's Bane. Whenever Arlyn, Orphan's Bane deals combat damage to a creature with toughness 2 or less, create a treasure token.

At the beginning of your upkeep, flip a coin.
If it is heads, transform Arlyn, Orphan's Bane.