Your search for "Moonstone Harbinger 101" revealed the following:
Moonstone Harbinger (BLB) from Bloomburrow, available at 401 Games Canada. Rarity: Uncommon Finish: Normal Artist: Kevin Sidharta Card Text:Flying, deathtouchWhenever you gain or lose life during your turn, Bats you control get +1/+0 and gain deathtouch until end of turn....
Moonstone Harbinger (Foil) (BLB) from Bloomburrow, available at 401 Games Canada. Rarity: Uncommon Finish: Foil Artist: Kevin Sidharta Card Text:Flying, deathtouchWhenever you gain or lose life during your turn, Bats you control get +1/+0 and gain deathtouch until end of...