First printed in Rise of the Eldrazi (2010)
Crab Umbra 
Enchantment — Aura
Enchant creature
: Untap enchanted creature.
Umbra armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)
Legality
- Legal in
- Modern, Legacy, Vintage, Commander, Duel Commander, PreDH, Tiny Leaders, Oathbreaker
- Not legal in
- Standard, Pioneer, Pauper, Future Standard, Historic, Timeless, Alchemy, Penny Dreadful, Premodern, Old School 93/94, Gladiator, Pauper Commander, Brawl, Standard Brawl, Competitive Brawl
MTGO price: 0.003 TIX, the cheapest non-foil print (average sell price on GoatBots, 28 Oct 2026).
Combos
47 combos from Commander Spellbook, the most popular first.
- Infinite colored mana: Crab Umbra + Sanctum Weaver
- Infinite colored mana: Crab Umbra + Kami of Whispered Hopes
- Infinite colored mana: Crab Umbra + Selvala, Heart of the Wilds
- Infinite colored mana: Axebane Guardian + Crab Umbra
- Infinite colored mana: Arbor Adherent + Crab Umbra
- Infinite damage, Near-infinite creature sacrifice triggers: Crab Umbra + Lightning-Rig Crew + Malcolm, Keen-Eyed Navigator
- Infinite colored mana: Crab Umbra + Heronblade Elite
- Infinite colored mana: Crab Umbra + Mona Lisa, Science Geek
- Infinite colored mana that can only be spent to activate abilities: Crab Umbra + Redshift, Rocketeer Chief
- Infinite colored mana: Accomplished Alchemist + Crab Umbra
