When Death Pit Offering enters the battlefield, sacrifice all creatures you control.

Creatures you control get +2/+2.

Whenever a creature is dealt damage, destroy it. It can't be regenerated.

Flying

Sacrifice a creature: Fallen Angel gets +2/+1 until end of turn.

Whenever a creature dies, Gristle Grinner gets +2/+2 until end of turn.

{T}, Tap three untapped white creatures you control: Destroy target creature.

Whenever a token you control leaves the battlefield, put a +1/+1 counter on Nadier, Agent of the Duskenel.

When Nadier leaves the battlefield, create a number of 1/1 green Elf Warrior creature tokens equal to its power.

Partner (You can have two commanders if both have partner.)

Sacrifice a creature: Phyrexian Ghoul gets +2/+2 until end of turn.

During your turn, creature tokens you control get +1/+4.

{3}{W}: Create a 1/1 white Soldier creature token.

Partner (You can have two commanders if both have partner.)

+2: Create two 0/1 black Thrull creature tokens.

+1: You may sacrifice another creature or planeswalker. If you do, draw two cards, then draw another card if the sacrificed permanent was a commander.

-10: Gain control of all commanders. Put all commanders from the command zone onto the battlefield under your control.

Tevesh Szat, Doom of Fools can be your commander.

Partner

If a creature dying causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Creature tokens you control have vigilance and lifelink.

Sacrifice three white creatures: Exile target creature.

Whenever another black creature you control dies, create a 1/1 white Spirit creature token with flying.

At the beginning of each end step, create X 1/1 white Spirit creature tokens with flying, where X is the number of tokens you created this turn.