First strike, lifelink
At the beginning of the end step, if you gained 3 or more life this turn, transform this creature.

Flying
Each player can't cast more than one spell each turn.
Nonbasic lands your opponents control enter tapped.

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.)

Weight of Spires deals damage to target creature equal to the number of nonbasic lands that creature's controller controls.

Counter target noncreature spell.

Trample, myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)
As long as this creature is attacking, it gets +X/+0, where X is the number of lands defending player controls.

Flash (You may cast this spell any time you could cast an instant.)
When Venser enters, return target spell or permanent to its owner's hand.

Enchant player
At the beginning of enchanted player's upkeep, this Aura deals 1 damage to that player or a planeswalker that player controls.

Enchant opponent
Whenever you attack enchanted player, that player loses 2 life. You draw a card and gain 2 life.
Whenever a player attacks you, you may attach this Aura to that player.

Create two 1/1 green Snake creature tokens.
Whenever a nontoken Snake you control enters, you may return this card from your graveyard to your hand.

Woman Who Walked the Earth — When Martha Jones enters, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")
Whenever you sacrifice a Clue, Martha Jones and up to one other target creature can't be blocked this turn.
Doctor's companion (You can have two commanders if the other is the Doctor.)

At end of combat, if Kytheon and at least two other creatures attacked this combat, exile Kytheon, then return him to the battlefield transformed under his owner's control.
: Kytheon gains indestructible until end of turn.

Trample
When this creature enters, create two Food tokens. (They're artifacts with ", , Sacrifice this token: You gain 3 life.")
Whenever this creature attacks, you may sacrifice a Food. If you do, mill three cards. You may put a permanent card from among them into your hand.

Flying
Whenever an opponent draws a card except the first one they draw in each of their draw steps, create a 1/1 green Snake creature token.
Whenever Xyris deals combat damage to a player, you and that player each draw that many cards.

: Add .
, : This land deals 2 damage to target player or planeswalker.

Copy target creature spell you control, except it isn't legendary if the spell is legendary. (A copy of a creature spell becomes a token.)

Flying
Whenever this creature attacks, look at the top six cards of your library. You may put an Aura or Equipment card from among them onto the battlefield. If an Equipment is put onto the battlefield this way, you may attach it to a creature you control. Put the rest of those cards on the bottom of your library in a random order.

, : Create a 0/1 green Egg creature token with defender.
Whenever an Egg you control dies, reveal cards from the top of your library until you reveal a creature card. Put that card onto the battlefield and the rest on the bottom of your library in a random order.

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.

Haste (This creature can attack and as soon as it comes under your control.)
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)