Create a 1/1 white Kor Soldier creature token for each creature you control.
Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Counter target spell that targets a player.

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle their library.

Exile target creature with toughness 4 or greater.

Return up to two target nonland permanents to their owners' hands.

: Equipped creature gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)
At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's blue.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Equipped creature has trample. (It can deal excess combat damage to the player or planeswalker it's attacking.)
At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's green.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Equipped creature has vigilance. (Attacking doesn't cause it to tap.)
At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's white.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Equipped creature has haste. (It can attack and no matter when it came under your control.)
At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's red.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

: Regenerate equipped creature. (The next time that creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)
At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's black.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

: Scalding Devil deals 1 damage to target player or planeswalker.

Shriekhorn enters the battlefield with three charge counters on it.
, Remove a charge counter from Shriekhorn: Target player mills two cards.

Defender, flying

Create an X/X black Horror creature token, where X is the number of creatures that died this turn.

Haste
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

Target creature gets +X/+X until end of turn.

: Vector Asp gains infect until end of turn. (It deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Exile target creature card from a graveyard. Create a 2/2 black Zombie creature token.

Target opponent exiles the top X cards of their library. You may cast any number of spells with converted mana cost X or less from among them without paying their mana costs.

Enchant creature
Enchanted creature gets +2/+2, has flying, and can't attack you or a planeswalker you control.