Enchant creature
Enchanted creature has mountainwalk. (It can't be blocked as long as defending player controls a Mountain.)

Creatures don't untap during their controllers' untap steps.
Whenever a creature enters, untap all creatures.

Horsemanship (This creature can't be blocked except by creatures with horsemanship.)
When Cao Ren enters, you lose 3 life.

Ward (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)
Three Autostubs — Whenever another source you control deals exactly 1 damage to a permanent or player, Ghyrson Starn deals 2 damage to that permanent or player.

Minion creatures get +1/+1.
, Exile Balthor: Each player returns all black and all red creature cards from their graveyard to the battlefield.

Devoid (This card has no color.)
Flying, Trample, Forestwalk, protection from non-Squirrels
When you cast Emrakul and Chatterfang, create 15 1/1 green Eldrazi Squirrel Scion creature tokens with "Sacrifice this creature: Add or ".

, : Choose a tournament-legal Mox you don't control at random. Create a token that's a copy of it. Then if you control all ten, create a Mox Lotus token. (The ten are Amber, Chrome, Diamond, Emerald, Jet, Opal, Pearl, Ruby, Sapphire, and Tantalite. Perhaps roll a d10?)
: Untap The Mox Painter.

Commander creatures you own have "Whenever you cast a spell from exile, this creature deals damage equal to that spell's mana value to target opponent."

Menace (This creature can't be blocked except by two or more creatures.)
Whenever Lathril deals combat damage to a player, create that many 1/1 green Elf Warrior creature tokens.
, Tap ten untapped Elves you control: Each opponent loses 10 life and you gain 10 life.

Destroy all nonblack creatures. Hellfire deals X plus 3 damage to you, where X is the number of creatures that died this way.

When you cast this spell, exile up to one target permanent that's one or more colors.
Whenever you cast a colorless spell, exile up to one target permanent that's one or more colors.
+2: You gain 3 life and draw a card.
0: Add .
−11: Search your library for any number of colorless nonland cards, exile them, then shuffle. Until end of turn, you may cast those cards without paying their mana costs.

Whenever you tap a Swamp for mana, add an additional .
: This creature gets +1/+1 until end of turn.

, Mill a card: Add .

Ward—Sacrifice a legendary artifact or legendary creature.
Whenever an opponent casts a spell, amass Orcs 1.
Whenever an Army you control deals combat damage to a player, the Ring tempts you.
Whenever the Ring tempts you, you may discard your hand. If you do, draw four cards.

Flying, vigilance, indestructible
Other permanents you control have indestructible.

Deathtouch
Whenever you draw a card, you gain 2 life.
Whenever an opponent draws a card, they lose 2 life.

Flying, haste
Whenever Smaug attacks, he deals damage equal to the number of Treasures you control to any target.
At the beginning of your upkeep, create a Treasure token.

When Clive enters, you may discard your hand, then draw cards equal to your devotion to red. (Each in the mana costs of permanents you control counts toward your devotion to red.)
, : Exile Clive, then return it to the battlefield transformed under its owner's control. Activate only as a sorcery.

If an opponent controls a Forest and you control an Island, you may cast this spell without paying its mana cost.
Put target creature on top of its owner's library.

Indestructible
When The One Ring enters, if you cast it, you gain protection from everything until your next turn.
At the beginning of your upkeep, you lose 1 life for each burden counter on The One Ring.
: Put a burden counter on The One Ring, then draw a card for each burden counter on The One Ring.