Whenever McCoy or another Doctor you control enters, put a +1/+1 counter on each creature you control.
Creatures you control with counters on them have lifelink.

Haste
Whenever you attack with three or more creatures, investigate.

, : Draw two cards.
, , Discard a card: This creature deals damage to target creature equal to the discarded card's mana value.

Convoke
Flying, vigilance
When this creature enters, create a 1/1 white and blue Merfolk creature token.

Create four 1/1 white Bird creature tokens with flying.
Basic landcycling

: This creature gains shroud until end of turn.
, Sacrifice this creature: It deals damage equal to its power to target creature.

Creatures you control get +1/+1.
Whenever you tap a land for mana, add one mana of any type that land produced.

Flying
Whenever Mirko Vosk deals combat damage to a player, that player reveals cards from the top of their library until they reveal four land cards, then puts those cards into their graveyard.

Permanents you control have "Ward — Sacrifice a permanent."
Each artifact card in your graveyard has unearth .

Flying
Whenever you cast a historic spell, return target nonland permanent card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step. If it would leave the battlefield, exile it instead of putting it anywhere else. (Artifacts, legendaries, and Sagas are historic.)

Whenever a creature you control dies, you gain 1 life and draw a card.

Whenever you cast a green creature spell, you may search your library for a creature card, reveal it, then shuffle and put that card on top.
Whenever you cast a blue creature spell, reveal the top card of your library. If it's a creature card, put that card into your hand.

This creature attacks each combat if able.
Cycling

Exile a creature card from your graveyard. Create a token that's a copy of it. It gains haste until end of turn. Exile it at the beginning of the next end step.
Storm

Creatures you control get +1/+0 and have haste.
At the beginning of your end step, exile any number of nontoken artifacts and/or creatures you control. Return those cards to the battlefield under their owner's control at the beginning of your next upkeep.

Whenever Naomi enters or attacks, if you control an artifact and an enchantment, create a 2/2 white Samurai creature token with vigilance.

Other snow and Zombie creatures you control get +1/+1.
: Return this card from your graveyard to the battlefield tapped. ( can be paid with one mana from a snow source.)

At the beginning of your upkeep, you may have target opponent discard a card at random.
Whenever an opponent discards a card, you may create a 1/1 green Elf Warrior creature token.

, : Choose a card name. Target opponent reveals X cards at random from their hand. Then that player discards all cards with that name revealed this way. Activate only during your turn.

Flying
Whenever this creature deals combat damage to a player, you may pay . If you do, create a 2/2 black Zombie creature token and each opponent mills two cards.

Whenever this creature attacks, defending player mills ten cards.

Fire a Nerf® blaster until empty at target library from at least two meters away. For each card knocked off that library, put it into its owner's graveyard and Nerf War deals ½ damage to that player.

You can't cast noncreature spells.
Whenever you tap a land for mana, add one mana of any type that land produced.

Whenever you cast an instant or sorcery spell, you may put three +1/+1 counters on target land you control. If you do, that land becomes a 0/0 Elemental creature with haste that's still a land.

Flash
Flying
Whenever you cast your first spell during each opponent's turn, look at the top two cards of your library. Put one of those cards into your hand and the other into your graveyard.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
Create two 1/1 white Human Soldier creature tokens.
Create two 2/2 red Human Knight creature tokens with trample and haste.
Put an indestructible counter on up to one target Human. You become the monarch.

When Oath of Teferi enters, exile another target permanent you control. Return it to the battlefield under its owner's control at the beginning of the next end step.
You may activate the loyalty abilities of planeswalkers you control twice each turn rather than only once.

Companion — Your starting deck contains only cards with odd mana values and land cards. (If this card is your chosen companion, you may put it into your hand from outside the game for any time you could cast a sorcery.)
If a source you control with an odd mana value would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

Return target permanent card from your graveyard to the battlefield.

Gift an Octopus (You may promise an opponent a gift as you cast this spell. If you do, when it enters, they create an 8/8 blue Octopus creature token.)
At the beginning of each end step, create a token that's a copy of target creature token that entered the battlefield this turn.