Vigilance
: Monstrosity 3.
As long as this creature is monstrous, it has reach and can block an additional ninety-nine creatures each combat.

Flying
Soulshift 4

Target creature gets +1/+0 and gains first strike until end of turn.
Splice onto Arcane — Tap an untapped white creature you control.

Flying
When this creature enters, target opponent creates a 4/4 black Horror creature token.

When this creature dies, create a 1/1 white Soldier creature token with lifelink.

Mutate
Whenever this creature mutates, other creatures you control get +X/+X until end of turn, where X is the number of times this creature has mutated.

Flying, lifelink
Creatures entering or dying don't cause abilities to trigger.

Flash
Flying
Creatures entering don't cause abilities to trigger.

Indestructible
Blessing of Light — At the beginning of combat on your turn, put a +1/+1 counter on another target creature you control. Until your next turn, it gains indestructible. If that creature is legendary, draw a card.

Enchant creature
Enchanted creature gets +1/+1 and has first strike.
Umbra armor

Flash
Flying
If a source would deal damage to you or a Hero you control, prevent all but 1 of that damage.

As an additional cost to cast this spell, you may behold a Hero.
Destroy target tapped creature. If a Hero was beheld, scry 2.

, Discard a card: Prevent the next 3 damage that would be dealt to any target this turn.
, Sacrifice this enchantment: Prevent the next 3 damage that would be dealt to any target this turn.

Science Teacher — Each Saga spell you cast has replicate. The replicate cost is equal to its mana cost.
Doctor's companion (You can have two commanders if the other is the Doctor.)

, , Discard a card: Create two 1/1 white Citizen creature tokens.

: This creature gains first strike until end of turn.
: This creature gains banding until end of turn.

This creature enters with a javelin counter on it.
, Remove a javelin counter from this creature: It deals 1 damage to any target.

: Target Soldier creature gets +1/+0 until end of turn.

This creature enters with three credit counters on it.
When this creature enters, it deals 3 damage to you.
At the beginning of your upkeep, put a credit counter on this creature.
Sacrifice this creature: You gain 1 life for each credit counter on this creature. Activate only during your upkeep.

: Target creature gets +1/+1 until end of turn.

, : Target creature gains first strike until end of turn.

First strike, banding
Whenever this creature attacks, all creatures banded with it gain first strike until end of turn.

Create four 1/1 white Citizen creature tokens.

Protection Fighting Style — When this creature enters, exile up to one target non-Warrior creature you control, then return it to the battlefield under its owner's control.

Equipped creature gets +2/+0.
Whenever equipped creature attacks, tap target creature defending player controls.
Equip

Flying, vigilance
When Icingdeath, Frost Tyrant dies, create Icingdeath, Frost Tongue, a legendary white Equipment artifact token with "Equipped creature gets +2/+0," "Whenever equipped creature attacks, tap target creature defending player controls," and equip .

Equipped creature gets +1/+2 and has "Whenever this creature attacks, another target attacking creature gains indestructible until end of turn."
Equip

When this artifact enters, exile all creature cards with mana value 3 or less from your graveyard until this artifact leaves the battlefield.
, : Until end of turn, you may cast a creature spell from among cards exiled with this artifact without paying its mana cost.

Enchant creature
Enchanted creature has "Whenever this creature attacks alone, it gets +X/+X until end of turn, where X is the number of nonland permanents you control."