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 - $6.80
LP - $5.50
MP - $4.10
HP - $2.70
DMG - $1.50