mtg search your library for a sorcery card Spellseeker (Foil Etched) [Commander Masters] “Ideas dont have to be big to be great.” o:"search your library" o:sorcery -o:transmute

All other cards in the deck are custom-designed as well BUT they use the original effects and abilities

Orim's Chant is either a Duress or a really good counterspell if you wish to go off with Explosion and would be worth playing without the Scepter

Or, even better, you can shift him onto Morph, Space Goo given its Mimicry ability

Similarly, a permanent entering the battlefield at the same time as Elesh Norn (still including Elesh Norn) won't cause abilities of permanents an opponent controls to trigger

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Summary Ugin's Labyrinth is a strong land card for accelerating spells and maintaining consistency in your deck - a valuable addition