Menace
When Shedding Snake enters the battlefield, you may pay 2 life. If you do, the commander tax on each of your commanders is reduced back to zero.

Nonwhite creatures with power 3 or greater don't untap during their controllers' untap steps.

Search your library for a creature card, reveal it, then shuffle and put that card on top.

All creatures get -1/-1 until end of turn for each Swamp you control.

Flash
Lifelink
When this creature enters, exile up to one other target creature. That creature's controller gains life equal to its power.
Evoke—Exile a white card from your hand.

(: Add .)

Sacrifice an artifact: Add .

Flash
When this creature enters and whenever an opponent draws a card except the first one they draw in each of their draw steps, this creature deals 1 damage to any target. Then amass Orcs 1.

This land enters tapped unless it's your first, second, or third turn of the game.
: Add .
, Pay 1 life: Add one mana of any color.

Search your library for a blue instant card, reveal that card, put it into your hand, then shuffle.

Negative — As long as K-9 is untapped, other legendary creatures you control have ward .
Affirmative — , : Target legendary creature can't be blocked this turn.
Doctor's companion (You can have two commanders if the other is the Doctor.)

Trample
Other Dinosaurs you control get +1/+1 and have hexproof. (They can't be the targets of spells or abilities your opponents control.)

Deathtouch, indestructible
Rhonas can't attack or block unless you control another creature with power 4 or greater.
: Another target creature gets +2/+0 and gains trample until end of turn.

Flash
As long as The Wandering Emperor entered this turn, you may activate her loyalty abilities any time you could cast an instant.
+1: Put a +1/+1 counter on up to one target creature. It gains first strike until end of turn.
−1: Create a 2/2 white Samurai creature token with vigilance.
−2: Exile target tapped creature. You gain 2 life.

When you have 30 or more life, flip Rune-Tail.

: Add one mana of any color.
, : Untap another target artifact.
, : Scry 1. (Look at the top card of your library. You may put that card on the bottom.)
, : Target creature can't be blocked this turn.

Enchant creature
Enchanted creature has first strike.

First strike, lifelink
Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)
At the beginning of your end step, if you gained life this turn, create a 1/1 white Cat creature token. Then if you have the city's blessing, for each token you control that entered this turn, create a token that's a copy of it.

As Three Tree City enters, choose a creature type.
: Add .
, : Choose a color. Add an amount of mana of that color equal to the number of creatures you control of the chosen type.

Flying
Whenever one or more creatures deal combat damage to you, each opponent sacrifices a creature of their choice that dealt combat damage to you this turn. The Ring tempts you.
Discard a card: Witch-king of Angmar gains indestructible until end of turn. Tap him.