Unearth

Return target creature card with mana value 3 or less from your graveyard to the battlefield.
Cycling (, Discard this card: Draw a card.)

Rampant Growth

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Mulldrifter

Flying
When Mulldrifter enters, draw two cards.
Evoke (You may cast this spell for its evoke cost. If you do, it’s sacrificed when it enters.)

Ancient Brass Dragon

Flying
Whenever Ancient Brass Dragon deals combat damage to a player, roll a d20. When you do, put any number of target creature cards with total mana value X or less from graveyards onto the battlefield under your control, where X is the result.

Lozhan, Dragons’ Legacy

Flying
Whenever you cast an Adventure or Dragon spell, Lozhan, Dragons’ Legacy deals damage equal to that spell’s mana value to any target that isn’t a commander.

Fountain Watch

Artifacts and enchantments you control have shroud. (They can’t be the targets of spells or abilities.)

Gorion, Wise Mentor

Vigilance
Whenever you cast an Adventure spell, you may copy it. You may choose new targets for the copy.

Miirym, Sentinel Wyrm

Flying, ward
Whenever another nontoken Dragon you control enters, create a token that’s a copy of it, except the token isn’t legendary.

Livaan, Cultist of Tiamat

Whenever you cast a noncreature spell, target creature gets +X/+0 until end of turn, where X is that spell’s mana value.
Choose a Background (You can have a Background as a second commander.)

Raggadragga, Goreguts Boss

Each creature you control with a mana ability gets +2/+2.
Whenever a creature you control with a mana ability attacks, untap it.
Whenever you cast a spell, if at least seven mana was spent to cast it, untap target creature. It gets +7/+7 and gains trample until end of turn.

Marching Duodrone

Whenever Marching Duodrone attacks, each player creates a Treasure token. (It’s an artifact with “, Sacrifice this artifact: Add one mana of any color.”)

Taunting Kobold

Haste
Whenever Taunting Kobold attacks, goad target creature an opponent controls. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

Mongrel Pack

When Mongrel Pack dies during combat, create four 1/1 green Dog creature tokens.

Well of Lost Dreams

Whenever you gain life, you may pay , where X is less than or equal to the amount of life you gained. If you do, draw X cards.

Ageless Entity

Whenever you gain life, put that many +1/+1 counters on Ageless Entity.

Wipe Away

Split second (As long as this spell is on the stack, players can’t cast spells or activate abilities that aren’t mana abilities.)
Return target permanent to its owner’s hand.

Primal Forcemage

Whenever another creature you control enters, that creature gets +3/+3 until end of turn.

Ivory Giant

When Ivory Giant enters, tap all nonwhite creatures.
Suspend 5— (Rather than cast this card from your hand, you may pay and exile it with five time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. It has haste.)

Kardur, Doomscourge

When Kardur, Doomscourge enters, until your next turn, creatures your opponents control attack each combat if able and attack a player other than you if able.
Whenever an attacking creature dies, each opponent loses 1 life and you gain 1 life.

Kardur, Doomscourge

When Kardur, Doomscourge enters, until your next turn, creatures your opponents control attack each combat if able and attack a player other than you if able.
Whenever an attacking creature dies, each opponent loses 1 life and you gain 1 life.

Changeling Hero

Changeling (This card is every creature type.)
Champion a creature (When this enters, sacrifice it unless you exile another creature you control. When this leaves the battlefield, that card returns to the battlefield.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)