Combos Utilizing Callous-Oppressor

gain control of any creature with oppressor by changing the creatures type to anything other than the forbidden one.

change target oppent's creature, control it with the oppressor and sacrifice it for nantuko husk for a bigger blocker or attacker

tap calleous oppressor gain control of opponent's creature. use synod sanctum to remove that creature from the game

other than srandardize you can use imagecrafter or other mistform cards. if you have enough blue mana to do it, you can gain control and sacrfice all of them to a beefed up carion feeder.

this one is like the others but type 2

much like the faceless butcher/natuko husk combo you put the effect of taking control of the creature on the stack toss out another creature with the gateway untapping the the callous and repeat.

tap the opressor take a crature sac it with plaguelor pay 1 life draw card discard it untap opressor repeat 4 all opponents creature