At the beginning of your end step, you may exile target creature you control, then return that card to the battlefield under your control.

Flying
Whenever Ganax or another Dragon you control enters, create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")
Choose a Background (You can have a Background as a second commander.)

Artifact, instant, and sorcery spells you cast cost less to cast.
: If you both own and control Urza, Lord Protector and an artifact named The Mightstone and Weakstone, exile them, then meld them into Urza, Planeswalker. Activate only as a sorcery.

When this artifact enters, search your library for up to two basic Plains cards, reveal them, put them into your hand, then shuffle.
Whenever a land an opponent controls enters, if that player controls more lands than you, you may put a land card from your hand onto the battlefield.

, : Exile target instant or sorcery spell that targets you. (The spell has no effect.)
, , Sacrifice Shell of the Last Kappa: You may cast a spell from among cards exiled with Shell of the Last Kappa without paying its mana cost.

Flying
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
: Skithiryx gains haste until end of turn.
: Regenerate Skithiryx.

Swarm of Rats's power is equal to the number of Rats you control.

This artifact enters tapped.
When this artifact enters, proliferate.
: Add one mana of any color.
Corrupted — : Add three mana of any one color. Activate only if an opponent has three or more poison counters.

Flying
When this creature enters, you may search your library for exactly two cards not named Burning-Rune Demon that have different names. If you do, reveal those cards. An opponent chooses one of them. Put the chosen card into your hand and the other into your graveyard, then shuffle.

At the beginning of your upkeep, each player draws a card.
Whenever an opponent draws a card, that player loses 1 life.

Flying
Cognivore's power and toughness are each equal to the number of instant cards in all graveyards.

Target player shuffles up to two target cards from their graveyard into their library.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

: Add .
: Add . Activate only if you control a Plains or a Swamp.

(Gain the next level as a sorcery to add its ability.)
When this Class enters, search your library for an Equipment card, reveal it, put it into your hand, then shuffle.
: Level 2
Equip abilities you activate cost less to activate.
: Level 3
Whenever a creature you control attacks, up to one target creature blocks it this combat if able.

Whenever you cast your second spell each turn, choose one —
• Create two 1/1 white Human Soldier creature tokens.
• Put a +1/+1 counter on each creature you control.

Defender
This creature enters with four ice counters on it.
Whenever you cast an instant or sorcery spell, remove an ice counter from this creature. Then if it has no ice counters on it, transform it.

Imprint — When this artifact enters, you may exile target land you control.
Whenever a land with the same name as the exiled card is tapped for mana, its controller adds one mana of any type that land produced.

Each creature that's enchanted by an Aura you control can't attack you or planeswalkers you control.
At the beginning of your end step, each opponent loses X life and you gain X life, where X is the number of Auras you control.

Flip a coin. If you win the flip, destroy all creatures with power 2 or less. If you lose the flip, destroy all creatures with power 3 or greater.

Trample, haste
Share Intelligence — Whenever Sergeant John Benton deals combat damage to a player, you and that player each draw that many cards.