Gor'Lugg, Moon Fang

Trample
Packless Fury — Whenever Gor'Lugg attacks alone, he gets +2/+2 until end of turn and fights target creature defending player controls.

Lunar Ascendance — At the beginning of your end step, if you cast a spell with mana value 5 or greater this turn,
Gor'Lugg transforms into his werewolf form.

Daybound
(If a player casts no spells during their own turn, it becomes night next turn.)