When Ironback Tyke enters, you may search your library for a basic Mountain or Plains card, reveal it, put it into your hand, then shuffle.
{2}{R}{W}: Any number of target creatures you control have base power and toughness 3/3 until end of turn. If you control seven or more permanents with activated abilities, transform Ironback Tyke. Activate only as a sorcery.

{2}{G}, {T}: Mill two cards, then create a tapped 1/1 white Citizen creature token.
{6}{G}{G}, {T}: Mill two cards, then create a tapped X/X colorless Construct artifact creature token, where X is the number of creature and/or enchantment cards in your graveyard.

Put a +1/+1 counter on target creature you control. It fights up to one target creature you don't control.
Cycling {R/G}

When this creature enters, cache the top card of your library face down.
Activated abilities of Memories you control cost {1} less to activate.

Whenever a nontoken creature you control dies, you draw a card and you lose 1 life.
{2}{B}, Sacrifice this creature: Create an X/X black Demon creature token, where X is the number of creatures you controlled that died this turn. Activate only as a sorcery.

When Kakomanties Circle enters, create a 2/2 black Zombie creature token.
Whenever a creature you control dies, each opponent loses 1 life and you gain 1 life.

At the beginning of combat on your turn, put a level counter on another target creature you control. If it doesn't have level up, it gains level up {2} and “This creature gets +1/+1 for each level counter on it.”

Indestructible
As long as your devotion to green and white is less than seven, Karametra isn't a creature.
Enchantments and enchanted permanents you control have “When this permanent becomes tapped for the first time during each of your turns, untap it.”

As Karda's Legacy enters, choose Iroas or Mogis.
• Iroas — Whenever you attack, create a 2/1 red Soldier creature token that's tapped and attacking.
• Mogis — Whenever a nontoken creature you control enters or dies, Karda's Legacy deals 1 damage to each opponent.

You may have Karina's Substitute enter as a copy of a creature you control, except it's 1/4 and a Toy in addition to its other types.

Whenever an opponent gains life or draws a card during your turn, you do the same.
[+1]: You may discard a card. If you do, each player may draw a card.
[+1]: For each player, up to one target creature they control gains vigilance and lifelink until end of turn.
[–7]: Choose a card type. Each opponent who controls more permanents of that type than you sacrifices a number equal to the difference.

Vigilance, lifelink
Whenever Kei attacks alone, it gains first strike until end of turn.

Choose one. If your devotion to blue is three or greater, you may choose another. The same is true for devotion to red.
• Return target sorcery card from your graveyard to your hand.
• Return target nonland permanent to its owner's hand.
• Destroy target artifact.

Indestructible
As long as your devotion to blue and red is less than seven, Keranos isn't a creature.
Noncreature spells you cast cost {1} less to cast.
Whenever you cast a noncreature spell, Keranos deals 1 damage to each opponent.

Double strike

Choose one. If your devotion to green is three or greater, you may choose another. The same is true for devotion to red.
• Put two +1/+1 counters on target creature.
• Target creature you control fights target creature you don't control.
• Klothys's Judgment deals 3 damage to target player.

Flying
Whenever this Vehicle attacks, reveal cards from the top of your library until you reveal a nonland card. Exile that card and put the rest on the bottom of your library in a random order. You may cast the exiled card without paying its mana cost if the resulting spell has mana value 2 or less.
Crew 2

Damned — At the beginning of your end step, put a +1/+1 counter on this creature if you've sacrificed a permanent this turn.
When this creature dies, create X 1/1 black Demon Insect creature tokens, where X is this creature's power.

Ward {1}
Whenever Kynaios, Blade-Bound or attacks, reveal the top five cards of your library. You may put an Aura card or a card with a Blessing from among them into your hand. Put the rest on the bottom of your library in any order.

Lifelink
Whenever Laboratory Mentor attacks, teach target attacking creature with lesser power lifelink.

Enchant creature
When Left to the Sea enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Choose one —
• Counter target spell unless its controller pays {3}.
• You gain 3 life and draw a card.

Level Drain deals 3 damage to target creature or planeswalker. You gain 3 life.
Add {B}{B}. Spend this mana only to pay level up costs.

When Leyrune Collector enters, look at the top four cards of your library. You may reveal an artifact or land card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. If you revealed a land this way, you may put a land card from your hand onto the battlefield tapped.
Wander {3}{G}{U}

This spell costs {2} less to cast if you attacked with a legendary creature this turn.
Exile the top two cards of your library. Until the end of your next turn, you may play those cards.