mtg sephiroth card MTGNexus Jenova Cells — Whenever Sephiroth attacks Sephiroth, Planet's Heir | Final

Can You Cast the Back Side of a Transforming DFC

It doesnt directly counter the spell but does likely give you a turn to build more of a board presence without your opponent messing around with your cards

Dack brings a fair amount to the table

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Every color has at least one good one and having a creature that's capable of fogging every turn, blowing up every Artifact or every Creature or in the case of Divining Witch, just being another way to win with Thoracle means people might not overextend into a threatened wipe, conceding you a bit of tempo advantage

A card like Bolas's Citadel allows you to keep paying life to cast your cheap eggs and to find your other enablers, while being a good alternative wincon