Obelisk of Urd 115 (Commander: Zendikar Rising)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) As this artifact enters, choose a creature type. Creatures you control of the chosen type get +2/+2.

NM - $5.00
LP - $4.00
MP - $3.00
HP - $2.00
DMG - $1.50