mtg two sided cards DFC as single split - Custom Card Creation - Magic Fundamentals - Salvation Forums Double-Faced Substitute Card · Innistrad:

This melded creature is then treated as a single creature that can be enchanted, equipped, and killed like any other, although it will fall apart into two pieces when sent to the graveyard

unless your opponent tries to have you sacrifice it I guess

Playing Double-Faced Cards Regardless of if you're playing with transforming cards or MDFCs, there are a few crucial things you remember

While both Tergrid and Tergrid's Lantern are arguably among the most powerful cards in this set, I don't think you gain much by having both on the field at once

These multi-phase cards represent creatures that evolve over time, adding new abilities as they increase in power

Rosewater went on to say battle cards with type other than Siege (every March of the Machine battle card carries this subtype and follows an Invasion of X name convention) will crop up eventually, but it might take a little time