TrampleWhenever Dreadhorde Arcanist attacks, you may cast target instant or sorcery card with mana value less than or equal to Dreadhorde Arcanist's power from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.
Other Goblin creatures you control attack each combat if able.At the beginning of combat on your turn, create a 1/1 red Goblin creature token with haste.Whenever Goblin Rabblemaster attacks, it gets +1/+0 until end of turn for each other attacking Goblin.
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)Lifelink (Damage dealt by this creature also causes you to gain that much life.)
If damage would be dealt to Undergrowth Champion while it has a +1/+1 counter on it, prevent that damage and remove a +1/+1 counter from Undergrowth Champion.Landfall — Whenever a land you control enters, put a +1/+1 counter on Undergrowth Champion.
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)