Ornithopter

Elvish Spirit Guide

Exile Elvish Spirit Guide from your hand: Add {G}.

Crimson Kobolds

City of Brass

Whenever City of Brass becomes tapped, it deals 1 damage to you.
{T}: Add one mana of any color.

Street Wraith

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
Cycling—Pay 2 life. (Pay 2 life, Discard this card: Draw a card.)

Grapeshot

Grapeshot deals 1 damage to any target.
Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

Glimpse of Nature

Whenever you cast a creature spell this turn, draw a card.

Phyrexian Walker

Gemstone Mine

Gemstone Mine enters with three mining counters on it.
{T}, Remove a mining counter from Gemstone Mine: Add one mana of any color. If there are no mining counters on Gemstone Mine, sacrifice it.

Noxious Revival

({G/P} can be paid with either {G} or 2 life.)
Put target card from a graveyard on top of its owner's library.

Serum Powder

{T}: Add {C}.
Any time you could mulligan and Serum Powder is in your hand, you may exile all the cards from your hand, then draw that many cards. (You can do this in addition to taking mulligans.)

Memnite

Scapegoat

As an additional cost to cast this spell, sacrifice a creature.
Return any number of target creatures you control to their owner's hand.

Lotus Petal

{T}, Sacrifice Lotus Petal: Add one mana of any color.

Mana Confluence

{T}, Pay 1 life: Add one mana of any color.

Kobolds of Kher Keep

Crookshank Kobolds

Shield Sphere

Defender
Whenever Shield Sphere blocks, put a -0/-1 counter on it.