Act of Treason

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and {T} this turn.)

Island

Mountain

Lightning Stormkin

Flying
Haste (This creature can attack and {T} as soon as it comes under your control.)

Warden of Evos Isle

Flying
Creature spells with flying you cast cost {1} less to cast.

Sage's Row Denizen

Whenever another blue creature you control enters, target player mills two cards.

Negate

Portal of Sanctuary

{1}, {T}: Return target creature you control and each Aura attached to it to their owners' hands. Activate only during your turn.

Mask of Immolation

When this Equipment enters, create a 1/1 red Elemental creature token, then attach this Equipment to it.
Equipped creature has "Sacrifice this creature: It deals 1 damage to any target."
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Anticipate

Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

Scholar of the Ages

When this creature enters, return up to two target instant and/or sorcery cards from your graveyard to your hand.

Convolute

Counter target spell unless its controller pays {4}.

Aether Gust

Choose target spell or permanent that's red or green. Its owner puts it on their choice of the top or bottom of their library.

Winged Words

This spell costs {1} less to cast if you control a creature with flying.
Draw two cards.

Icon of Ancestry

As this artifact enters, choose a creature type.
Creatures you control of the chosen type get +1/+1.
{3}, {T}: Look at the top three cards of your library. You may reveal a creature card of the chosen type from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Zephyr Charge

{1}{U}: Target creature gains flying until end of turn.

Cloudkin Seer

Flying
When this creature enters, draw a card.

Shock

Swiftwater Cliffs

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {U} or {R}.