Whenever an opponent discards a card, you may draw a card.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
As long as this card is in your graveyard and you control a Swamp, creatures you control have swampwalk.

Flying
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
Sacrifice a creature: This creature gets +1/+1 until end of turn.

Draw three cards.

Create two 1/1 white Bird creature tokens with flying.
Flashback—Tap three untapped white creatures you control. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

When this creature dies, you may exile it. If you do, reveal cards from the top of your library until you reveal a creature card. Put that card onto the battlefield and put all other cards revealed this way into your graveyard.

Flying
Whenever this creature becomes the target of a spell or ability, this creature gets +0/+3 until end of turn.

Whenever another creature you control enters, target creature an opponent controls gets -1/-1 until end of turn.

Flying
: Scry 1, then reveal the top card of your library. This creature gets +X/+0 until end of turn, where X is that card's mana value. (To scry 1, look at the top card of your library, then you may put that card on the bottom.)

Flash
When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield.
Cycling (, Discard this card: Draw a card.)

If an opponent had three or more cards put into their graveyard from anywhere this turn, you may pay rather than pay this spell's mana cost.
Exile target player's graveyard.

Vigilance
Creatures can't attack you or planeswalkers you control unless their controller pays for each of those creatures.

Whenever a creature attacks you or a planeswalker you control, that creature's controller loses 1 life and you gain 1 life.

Whenever another creature you control enters, you gain 2 life.

Whenever you gain life, put a +1/+1 counter on this creature.
As long as you have 25 or more life, this creature has double strike. (It deals both first-strike and regular combat damage.)

When this creature enters, gain control of target creature an opponent controls with power 2 or less until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and this turn.)

Prevent all noncombat damage that would be dealt to you and other permanents you control.
−2: Exile target creature with power 4 or greater.

Reach (This creature can block creatures with flying.)
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
Whenever another creature dies, each opponent loses 1 life.

Wild Magic Surge — Whenever this creature attacks, roll a d20.
1—9 | Exile the top card of your library. You may play it this turn.
10—19 | Exile the top two cards of your library. You may play them this turn.
20 | Exile the top three cards of your library. You may play them this turn.

Create a token that's a copy of target creature you control, except the token has flying and it isn't legendary.

Tap an untapped creature you control: This enchantment deals 1 damage to target player or planeswalker.

Flying
When this creature enters, shuffle the cards from your hand into your library, then draw that many cards.
When this creature dies, shuffle the cards from your hand into your library, then draw that many cards.

Changeling (This card is every creature type.)
Haste
Champion a creature (When this enters, sacrifice it unless you exile another creature you control. When this leaves the battlefield, that card returns to the battlefield.)

As long as you control a Mountain, this creature has menace. (It can't be blocked except by two or more creatures.)

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
: Tap target creature without flying.

Whenever one or more creatures attack you, if this creature is untapped, you may untap all creatures you control.

Each player sacrifices two creatures of their choice.

When this enchantment enters, you become the monarch.
Whenever a creature attacks you or a planeswalker you control, that creature's controller loses 1 life.

: Draw a card.

: This creature gets +1/-1 until end of turn.

When this creature enters, destroy target creature an opponent controls.

Destroy target land. Creatures without flying can't block this turn.

Flying, trample

Smiting Helix deals 3 damage to any target and you gain 3 life.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

When this creature enters, tap all creatures target opponent controls.

Whenever this creature attacks, you may change the base power and toughness of target Human you control to this creature's power and toughness until end of turn.