Combos Utilizing Circle-of-Despair

just before blastoderm fades away, sacrifice it to prevent damage to either you or a creature of your choice.

Have Dingus Egg,Lotus Petal,and Circle of Derspair out make sure you have one creature out and your opponent has at least ten lands so when you play Armageddon, sac Lotus for a color and C.O.D. Dingus

have circle of despair in play. attack with dark maze. before the end of your turn, sac dark maze to prevent damage from an opponent's source to a creature or yourself.

Lingering Mirage turns opponent's land into an island. Use Seasinger to take control of opponent's creature. Sac that creature to prevent the next source of damage to you.

Tap Tidal Warrior to turn opponent's land into an island. Use Seasinger to take control of opponent's creature. Sacrifice that creature to prevent the next source of damage to you.