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.)