Giant Slayer

When Giant Slayer blocks or is blocked by a
creature with toughness 4 or more Giant
Slayer's power, it gains Deathtouch and
Indestructible until end of turn.
When Giant Slayer deals combat damage to a
Creature with power 4 or more creature a
colorless Treasure artifact token with
"{t}, Sacrifice this artifact: Add one mana of any
color."