Crookshank Kobolds

Halo Hopper

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

Forest

Phyrexian Walker

Dangerous Wager

Ornithopter

Land Grant

If you have no land cards in hand, you may reveal your hand rather than pay this spell's mana cost.
Search your library for a Forest card, reveal that card, put it into your hand, then shuffle.

Lotus Petal

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

Mob Justice

Mob Justice deals damage to target player or planeswalker equal to the number of creatures you control.

Simian Spirit Guide

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

Crimson Kobolds

Kobolds of Kher Keep

Wooded Ridgeline

({T}: Add {R} or {G}.)
Wooded Ridgeline enters tapped.

Will-Forged Golem

Goblin Bushwhacker

Kicker {R} (You may pay an additional {R} as you cast this spell.)
When this creature enters, if it was kicked, creatures you control get +1/+0 and gain haste until end of turn.

Manamorphose

Add two mana in any combination of colors.
Draw a card.

Might of the Masses

Target creature gets +1/+1 until end of turn for each creature you control.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.