Arbor Elf

Forest

Goblin Anarchomancer

Each spell you cast that's red or green costs {1} less to cast.

Stinkdrinker Daredevil

Giant spells you cast cost {2} less to cast.

Wild Growth

Enchant land
Whenever enchanted land is tapped for mana, its controller adds an additional {G}.

Garenbrig Paladin

Adamant — If at least three green mana was spent to cast this spell, Garenbrig Paladin enters with a +1/+1 counter on it.
Garenbrig Paladin can't be blocked by creatures with power 2 or less.

Highland Forest

({T}: Add {R} or {G}.)
Highland Forest enters tapped.

Hill Giant Herdgorger

When Hill Giant Herdgorger enters, you gain 3 life.

Giant's Ire

Giant's Ire deals 4 damage to target player or planeswalker. If you control a Giant, draw a card.

Mountain

Hotheaded Giant

Haste
Hotheaded Giant enters with two -1/-1 counters on it unless you've cast another red spell this turn.