If you control a creature, damage that would reduce your life total to less than 1 reduces it to 1 instead.

Return an Elf you control to its owner's hand: Untap target creature. Activate only once each turn.

If you would planeswalk, instead look at the top two cards of your planar deck, put one on the bottom of your planar deck and the other on top, then planeswalk.
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Doctor's companion (You can have two commanders if the other is the Doctor.)

Whenever you're dealt damage, you may create that many 1/1 white Soldier creature tokens.

Enchant creature
As long as enchanted creature is blue, it gets +1/+1 and has shroud. (It can't be the target of spells or abilities.)
As long as enchanted creature is red, it gets +1/+1 and has haste.

Search your library for up to two Forest cards, put them onto the battlefield, then shuffle.

All creatures get -2/-2 until end of turn.
Infusion — If you gained life this turn, destroy all creatures instead.

Whenever a creature you control deals combat damage to a player, you may draw a card.
Cycling (, Discard this card: Draw a card.)

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.

Exile target nonland permanent. You lose 3 life.

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.

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

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.

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.

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.

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