You may choose not to untap Callous Oppressor during your untap step.

As Callous Oppressor enters the battlefield, an opponent chooses a creature type.

: Gain control of target creature that isn't of the chosen type for as long as Callous Oppressor remains tapped.

: Target player draws two cards, then discards two cards.

Whenever Cephalid Constable deals combat damage to a player, return up to that many target permanents that player controls to their owners' hands.

Discard a card: Cephalid Inkshrouder gains shroud until end of turn and is unblockable this turn. (A permanent with shroud can't be the target of spells or abilities.)

Cephalid Pathmage is unblockable.

, Sacrifice Cephalid Pathmage: Target creature is unblockable this turn.

Threshold — As long as seven or more cards are in your graveyard, Cephalid Sage has "When Cephalid Sage enters the battlefield, draw three cards, then discard two cards."

Whenever a player casts a spell, counter that spell unless that player pays , where X is the number of cards in all graveyards with the same name as the spell.

At the beginning of your upkeep, put a shred counter on Cephalid Vandal. Then put the top card of your library into your graveyard for each shred counter on Cephalid Vandal.