Rules Text Contains: Whenever Ill-Tempered Loner is dealt damage, it deals that much damage to any target.
1R: Ill-Tempered Loner gets +2/+0 until end of turn.
Daybound
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Howlpack Avenger
Whenever a permanent you control is dealt damage, Howlpack Avenger deals that much damage to any target.
1R: Howlpack Avenger gets +2/+0 until end of turn.
Nightbound