Rally the Monastery is a uncommon Instant card from Tarkir: Dragonstorm (TDM), collector number 19. Current market price: $0.24 (foil $0.25), TCGplayer market prices via Scryfall.
This spell costs {2} less to cast if you've cast another spell this turn. Choose one — • Create two 1/1 white Monk creature tokens with prowess. • Up to two target creatures you control each get +2/+2 until end of turn. • Destroy target creature with power 4 or greater.