Each player can't cast more than one spell each turn.
Nonbasic lands your opponents control enter tapped.
2 /
3
--
Arid Mesa
Land
{T}, Pay 1 life, Sacrifice Arid Mesa: Search your library for a Mountain or Plains card, put it onto the battlefield, then shuffle.
{2}{W}{W}
Cataclysm
Sorcery
Each player chooses from among the permanents they control an artifact, a creature, an enchantment, and a land, then sacrifices the rest.
{1}{W}
Containment Priest
Creature - Human Cleric
Flash
If a nontoken creature would enter and it wasn't cast, exile it instead.
2 /
2
{1}{W}
Ethersworn Canonist
Artifact Creature - Human Cleric
Each player who has cast a nonartifact spell this turn can't cast additional nonartifact spells.
2 /
2
{4}
Hammer of Nazahn
Legendary Artifact - Equipment
Whenever Hammer of Nazahn or another Equipment enters the battlefield under your control, you may attach that Equipment to target creature you control.
Equipped creature gets +2/+0 and has indestructible.
Equip {4}
{3}
Mithril Coat
Legendary Artifact - Equipment
Flash
Indestructible
When Mithril Coat enters the battlefield, attach it to target legendary creature you control.
Equipped creature has indestructible.
Equip {3}
{W}
On Thin Ice
Snow Enchantment - Aura
Enchant snow land you control
When On Thin Ice enters the battlefield, exile target creature an opponent controls until On Thin Ice leaves the battlefield.
{W}
Steelshaper's Gift
Sorcery
Search your library for an Equipment card, reveal that card, put it into your hand, then shuffle.
{1}{U}
The Reality Chip
Legendary Artifact Creature - Equipment Jellyfish
You may look at the top card of your library any time.
As long as The Reality Chip is attached to a creature, you may play lands and cast spells from the top of your library.
Reconfigure {2}{U} ({2}{U}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)
0 /
4
{2}{W}{W}
The Wandering Emperor
Legendary Planeswalker
Flash
As long as The Wandering Emperor entered the battlefield 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.