Ill-Tempered Loner // Howlpack Avenger (VOW-378) - Innistrad: Crimson Vow: (Extended Art, Double Faced Transform)

Whenever Ill-Tempered Loner is dealt damage, it deals that much damage to any target.
: Ill-Tempered Loner gets +2/+0 until end of turn.
Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

Whenever a permanent you control is dealt damage, Howlpack Avenger deals that much damage to any target.
: Howlpack Avenger gets +2/+0 until end of turn.
Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)