Instant and sorcery spells you cast cost less to cast.

Whenever another snow permanent you control enters, you may have target player mill two cards.

Play with the top card of your library revealed.
You may play lands and cast spells from the top of your library.

Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.)
This land enters tapped.
: Add .
, : You may play the exiled card without paying its mana cost if creatures you control have total power 10 or greater.

Flurry of Blows — Whenever you cast your second spell each turn, put a +1/+1 counter on this creature.

: Add .
, , Sacrifice this land: Destroy target nonbasic land an opponent controls. That player may search their library for a basic land card, put it onto the battlefield, then shuffle. You create a Treasure token.

Flash
When this creature enters, choose one —
• You gain 3 life and surveil 3. (Look at the top three cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)
• Destroy target enchantment.
• Counter target creature spell.

Whenever Jareth blocks, it gets +7/+7 until end of turn.
: Jareth gains protection from the color of your choice until end of turn.

Enchant noncommander creature
You control enchanted creature.
Enchanted creature gets +2/+2 and can't be blocked unless it's attacking its owner or a permanent its owner controls.

Defender (This creature can't attack.)
Whenever you gain life, put a +1/+1 counter on this creature.
, Sacrifice this creature: Target player loses X life, where X is this creature's power.

(: Add .)

This creature can't block.
Prowl (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Goblin or Rogue.)
Whenever a Goblin or Rogue you control deals combat damage to a player, if this card is in your graveyard, you may return this card to your hand.

Whenever Haliya enters or attacks, put a +1/+1 counter on target creature you control.
Whenever one or more creatures you control with +1/+1 counters on them deal combat damage to a player, draw a card.

Haste (This creature can attack and as soon as it comes under your control.)
You may exert this creature as it attacks. When you do, target creature can't block this turn. (An exerted creature won't untap during your next untap step.)

Flying
When this creature enters, it deals 4 damage to any target.
: This creature gets +1/+0 until end of turn.

Counter target spell. Search its controller's graveyard, hand, and library for all cards with the same name as that spell and exile them. Then that player shuffles.

When this creature enters, you gain 3 life.

Ferocious — If you control a creature with power 4 or greater, damage can't be prevented this turn.
Wild Slash deals 2 damage to any target.

Prevent all combat damage that would be dealt this turn. Clash with an opponent. If you win, creatures that player controls don't untap during the player's next untap step. (Each clashing player reveals the top card of their library, then puts that card on their choice of the top or bottom. A player wins if their card had a greater mana value.)

( can be paid with either or .)
Flying
When this creature enters, sacrifice it unless you discard two cards.