Stormcarved Coast

Stormcarved Coast enters tapped unless you control two or more other lands.
{T}: Add {U} or {R}.

Shivan Reef

{T}: Add {C}.
{T}: Add {U} or {R}. Shivan Reef deals 1 damage to you.

Long-Term Plans

Search your library for a card, then shuffle and put that card third from the top.

Thermo-Alchemist

Defender
{T}: Thermo-Alchemist deals 1 damage to each opponent.
Whenever you cast an instant or sorcery spell, untap Thermo-Alchemist.

Molten Tributary

({T}: Add {U} or {R}.)
Molten Tributary enters tapped.

Pestermite

Flash
Flying
When Pestermite enters, you may tap or untap target permanent.

Island

Mountain

Mountain // Mountain

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Counterspell

Scry 1. (Look at the top card of your library. You may put that card on the bottom.)
Draw a card.

Splinter Twin

Enchant creature
Enchanted creature has "{T}: Create a token that's a copy of this creature, except it has haste. Exile that token at the beginning of the next end step."

Negate

Firebrand Archer

Whenever you cast a noncreature spell, this creature deals 1 damage to each opponent.