Fight or Flight [Invasion]

Fight or Flight [Invasion]Set: Invasion Type: Enchantment Rarity: Rare Cost: {3}{W} At the beginning of combat on each opponent's turn, separate all creatures that player controls into two piles. Only creatures in the pile of their choice can attack this turn.

and all souls should be free

it's a Spirit in addition to its other types

Blood Arbiter

you may return target creature card with mana value 3 or less from your graveyard to the battlefield

Set: Urza's Destiny Type: Creature — Human Cleric Rarity: Rare Cost: {3}{W} When Academy Rector dies

you may turn this creature face down

Merfolk spells and Wizard spells you cast cost {1} less to cast

They once sought to unite with the flame of transcendence

Set: Fate Reforged Type: Creature — Wall Rarity: Uncommon Cost: {1}{W} Flash (You may cast this spell any time you could cast an instant

or my ancestry

Set: Commander Anthology Volume II Type: Sorcery Rarity: Uncommon Cost: {4}{B} Each other player sacrifices a creature

After this main phase