Shield Sphere

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

Copperline Gorge

Copperline Gorge enters tapped unless you control two or fewer other lands.
{T}: Add {R} or {G}.

Simian Spirit Guide

Exile Simian Spirit Guide from your hand: Add {R}.

Infernal Plunge

As an additional cost to cast this spell, sacrifice a creature.
Add {R}{R}{R}.

Crookshank Kobolds

Phyrexian Walker

Crimson Kobolds

Memnite

Endless One

Endless One enters with X +1/+1 counters on it.

Ornithopter

Kobolds of Kher Keep

Elvish Spirit Guide

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

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.)

Gamble

Search your library for a card, put that card into your hand, discard a card at random, then shuffle.

Glimpse of Nature

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

Cloudstone Curio

Whenever a nonartifact permanent you control enters, you may return another permanent you control that shares a permanent type with it to its owner's hand.