Double strike, indestructible
Oketra can't attack or block unless you control at least three other creatures.
: Create a 1/1 white Warrior creature token with vigilance.

, Pay 1 life: Add or .
, : Mount Doom deals 1 damage to each opponent.
, , Sacrifice Mount Doom and a legendary artifact: Choose up to two creatures, then destroy the rest. Activate only as a sorcery.

This land enters tapped unless you have two or more opponents.
: Add or .

(: Add .)

Whenever Bruse Tarl enters or attacks, target creature you control gains double strike and lifelink until end of turn.
Partner (You can have two commanders if both have partner.)

(: Add or .)
As this land enters, you may pay 2 life. If you don't, it enters tapped.

Creatures you control have first strike.
Creatures your opponents control lose first strike and can't have or gain first strike.

Flying, haste
Whenever this creature or another Dinosaur you control with flying enters, gain control of target creature an opponent controls until end of turn. Untap that creature. It gains flying and haste until end of turn. At the beginning of the next end step, target land deals 3 damage to that creature.

: Each player draws a card.

Snake offering (You may cast this spell any time you could cast an instant by sacrificing a Snake and paying the difference in mana costs between this and the sacrificed Snake. Mana cost includes color.)
: Untap all Forests and all green creatures. Activate only once each turn.

: Target creature you control gains protection from the color of your choice until end of turn.

Activated abilities of artifacts can't be activated.

Artifact creatures and Heroes you control get +1/+1 for each Artificer you control and each Artificer card in your graveyard.
A deck can have any number of cards named Cid, Timeless Artificer.
Cycling (, Discard this card: Draw a card.)

Landfall — Whenever a land you control enters, you may mill two cards.
, Sacrifice this enchantment: Create X 1/1 green Minion creature tokens named Moloid, where X is the number of permanent cards in your graveyard. The tokens have "Whenever this token attacks, you may mill a card." Activate only as a sorcery.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
Other creatures you control with infect get +1/+1.
Whenever you cast a creature spell with infect, target player gets a poison counter.

Whenever a creature you control enters, you gain life equal to its toughness.

Each creature you control with a counter on it has ward . (Whenever it becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)
: Put a +1/+1 counter on target creature that entered this turn.

Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.

Counter target spell. Choose 1, 2, or 3 at random. Its controller mills that many cards, then exiles cards from the top of their library until they exile a nonland card with a different name than that spell. They may cast that card without paying its mana cost. Then they put the exiled cards on the bottom of their library in a random order.

You gain 3 life for each creature attacking you.