Spells your opponents cast cost more to cast.
At the beginning of your end step, each opponent loses 1 life.

When this creature enters, you may return target red sorcery card from your graveyard to your hand.
When this creature enters, you may return target blue instant card from your graveyard to your hand.

Vigilance (Attacking doesn't cause this creature to tap.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)
At the beginning of your upkeep, if you have 40 or more life, you win the game.

You may sacrifice two Mountains rather than pay this spell's mana cost.
Fireblast deals 4 damage to any target.

Vigilance, reach
All creatures attack each combat if able.
Whenever a creature attacks you or a planeswalker you control, put a +1/+1 counter on Thantis.

: This creature can't be blocked this turn.

, , Sacrifice Mindslaver: You control target player during that player's next turn. (You see all cards that player could see and make all decisions for them.)

Menace
When this creature dies, each player may discard their hand and draw seven cards.
Mountaincycling (, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)

: Return this creature to its owner's hand.
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.)

Choose one or more —
• Counter target spell.
• Counter target activated or triggered ability.
• Return target nonland permanent to its owner's hand.
• Create a token that's a copy of target creature you control.
• Target player draws a card.

Create three 2/2 white Samurai creature tokens with vigilance. Scry 3.

As this artifact enters, choose a creature type.
, , Sacrifice a creature of the chosen type: This artifact deals 3 damage to any target.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

+2: Until your next turn, up to two target creatures each have base power and toughness 0/3 and lose all abilities.
−2: Target player draws two cards. Until your next turn, instant, sorcery, and planeswalker spells that player casts cost less to cast.
−8: Target player gets an emblem with "Whenever you cast an instant or sorcery spell, copy it. You may choose new targets for the copy."
Partner with Rowan Kenrith
Will Kenrith can be your commander.

Menace
Cycling (, Discard this card: Draw a card.)

Destroy target land and all other lands with the same name as that land.

Vigilance
: Untap target attacking creature. Prevent all combat damage that would be dealt to and dealt by that creature this turn.
Suspend 4—

Destroy three target permanents.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)
Whenever this creature attacks, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Flying, haste
When Karrthus enters, gain control of all Dragons, then untap all Dragons.
Other Dragon creatures you control have haste.

Vigilance
This creature can block an additional creature each combat for each Equipment attached to this creature.

Flying
When this creature enters, you may exile up to three other target creatures from the battlefield and/or creature cards from graveyards.
When this creature leaves the battlefield, return the exiled cards to their owners' hands.

Trample
Whenever this creature or another creature you control enters, this creature fights up to one target creature you don't control.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)
Cycling (, Discard this card: Draw a card.)

Trample
Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Landfall — Whenever a land you control enters, create a 5/5 red and green Elemental creature token.
Whenever Omnath or another Elemental you control dies, Omnath deals 3 damage to any target.

Target player draws cards equal to half the number of cards in their library and loses half their life. Round up each time.

Each player sacrifices all permanents they control that are one or more colors.

Flying
Whenever a creature you control deals combat damage to a player, create that many Treasure tokens.

Target player loses 4 life and you gain 4 life.
Basic landcycling (, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

Choose a creature type. Destroy all creatures that aren't of the chosen type.

Flying
When this creature enters, creatures your opponents control get -2/-2 until end of turn.
Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Creatures you control have flying, first strike, vigilance, trample, haste, and protection from black and from red.

Create a 4/4 green Beast creature token.
Storm (When you cast this spell, copy it for each spell cast before it this turn.)

, : This creature deals 5 damage to target attacking or blocking creature with flying.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

You may exile two green cards from your hand rather than pay this spell's mana cost.
Allosaurus Rider's power and toughness are each equal to 1 plus the number of lands you control.