Starlight Shards

Activated abilities of creatures you control cost {2} less to activate. This effect can't reduce the mana in that cost to less than one mana.

(Training Grounds)

An ephemeral sliver that gives off a pale blue glow. What remains of a passing flash of starlight.
A prized item that was ince used in the Eternal City as an ingredient in intoxicating draughts.