Whenever a creature is dealt damage, destroy it. It can't be regenerated.
"Neither could I forget what I had read of these pits—that the sudden extinction of life formed no part of their most horrible plan." —Edgar Allan Poe, "The Pit and the Pendulum"
Exile all artifacts, creatures, and lands from the battlefield, all cards from all graveyards, and all cards from all hands. Cycling {5}{R}{R} When you cycle Decree of Annihilation, destroy all lands.
Create X 4/4 white Angel creature tokens with flying. Cycling {2}{W} When you cycle Decree of Justice, you may pay {X}. If you do, create X 1/1 white Soldier creature tokens.
Destroy all creatures. They can't be regenerated. Draw a card for each creature destroyed this way. Cycling {3}{B}{B} When you cycle Decree of Pain, all creatures get -2/-2 until end of turn.
Put four +1/+1 counters on each creature you control. Cycling {4}{G}{G} When you cycle Decree of Savagery, you may put four +1/+1 counters on target creature.
Whenever an opponent casts a spell, counter that spell and put a depletion counter on Decree of Silence. If there are three or more depletion counters on Decree of Silence, sacrifice it. Cycling {4}{U}{U} When you cycle Decree of Silence, you may counter target spell.
Flying Morph {2}{U}{U} When Dermoplasm is turned face up, you may put a creature card with a morph ability from your hand onto the battlefield face up. If you do, return Dermoplasm to its owner's hand.