Juggernaut

This creature attacks each combat if able.
This creature can't be blocked by Walls.

Ridgetop Raptor

Double strike (This creature deals both first-strike and regular combat damage.)

Force of Will

You may pay 1 life and exile a blue card from your hand rather than pay this spell's mana cost.
Counter target spell.

Shivan Dragon

Flying
{R}: This creature gets +1/+0 until end of turn.

Mishra's Factory

{T}: Add {C}.
{1}: Mishra's Factory becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.
{T}: Target Assembly-Worker creature gets +1/+1 until end of turn.

Sulfur Falls

Sulfur Falls enters tapped unless you control an Island or a Mountain.
{T}: Add {U} or {R}.

Aven Fateshaper

Flying
When Aven Fateshaper enters, look at the top four cards of your library, then put them back in any order.
{4}{U}: Look at the top four cards of your library, then put them back in any order.

Denizen of the Deep

When Denizen of the Deep enters, return each other creature you control to its owner's hand.

Last Chance

Take an extra turn after this one. At the beginning of that turn's end step, you lose the game.

Time Stretch

Target player takes two extra turns after this one.

Island

Jester's Cap

{2}, {T}, Sacrifice Jester's Cap: Search target player's library for three cards and exile them. Then that player shuffles.

Maze of Ith

{T}: Untap target attacking creature. Prevent all combat damage that would be dealt to and dealt by that creature this turn.

Mystical Tutor

Search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top.

Mountain

Counterspell

Confiscate

Enchant permanent
You control enchanted permanent.

Icy Manipulator

{1}, {T}: Tap target artifact, creature, or land.

Urza, Lord High Artificer

When Urza, Lord High Artificer enters, create a 0/0 colorless Construct artifact creature token with "This creature gets +1/+1 for each artifact you control."
Tap an untapped artifact you control: Add {U}.
{5}: Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.