First printed in Tempest (1997)
Worthy Cause 
Instant
Buyback 
(You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)
As an additional cost to cast this spell, sacrifice a creature.
You gain life equal to the sacrificed creature's toughness.
Legality
- Legal in
- Legacy, Vintage, Premodern, Commander, Duel Commander, PreDH, Tiny Leaders, Oathbreaker
- Not legal in
- Standard, Pioneer, Modern, Pauper, Future Standard, Historic, Timeless, Alchemy, Penny Dreadful, Old School 93/94, Gladiator, Pauper Commander, Brawl, Standard Brawl, Competitive Brawl
MTGO price: 0.24 TIX, the cheapest non-foil print (average sell price on GoatBots, 28 Oct 2026).
Combos
19 combos from Commander Spellbook, the most popular first.
- Infinite lifegain: Outrider en-Kor + Task Force + Worthy Cause
- Infinite lifegain: Nomads en-Kor + Task Force + Worthy Cause
- Infinite lifegain: Daru Spiritualist + Nomads en-Kor + Worthy Cause
- Infinite lifegain: Daru Spiritualist + Outrider en-Kor + Worthy Cause
- Infinite lifegain: Daru Spiritualist + Shaman en-Kor + Worthy Cause
- Infinite lifegain: Shaman en-Kor + Task Force + Worthy Cause
- Infinite lifegain: Daru Spiritualist + Warrior en-Kor + Worthy Cause
- Infinite lifegain: Task Force + Warrior en-Kor + Worthy Cause
- Infinite lifegain: Angelic Protector + Outrider en-Kor + Worthy Cause
- Infinite lifegain: Spirit en-Kor + Task Force + Worthy Cause