Teraset, Luminous Conjurant

Flying, lifelink, trample
Whenever Teraset, Luminous Conjurant attacks, Nightcreatures you control gain +3/+0 until end
of turn. (Werewolves, vampires, zombies, horrors and spirits are Nightcreatures)
Nightbound (If a player cast at least two spells this
turn, it becomes day next turn.)