Undergrowth — This spell costs {1} less to cast for each creature card in your graveyard. When Molderhulk enters the battlefield, return target land card from your graveyard to the battlefield.

This spell costs {1} less to cast for each creature card in your graveyard. {7}{G}{G}: Monstrosity 5. This ability costs {1} less to activate for each creature card in your graveyard. (If this creature isn't monstrous, put five +1/+1 counters on it and it becomes monstrous.)

Bestow {2}{B}{B} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.) Nighthowler and enchanted creature each get +X/+X, where X is the number of creature cards in all graveyards.

When Rubblebelt Maverick enters the battlefield, surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) {G}, Exile Rubblebelt Maverick from your graveyard: Put a +1/+1 counter on target creature. Activate only as a sorcery.

When Satyr Wayfinder enters the battlefield, reveal the top four cards of your library. You may put a land card from among them into your hand. Put the rest into your graveyard.

When Stitcher's Supplier enters the battlefield or dies, mill three cards.

When Tranquil Frillback enters the battlefield, you may pay {G} up to three times. When you pay this cost one or more times, choose up to that many — • Destroy target artifact or enchantment. • Exile target player's graveyard. • You gain 4 life.

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Destroy target creature.

Blooming Marsh enters the battlefield tapped unless you control two or fewer other lands. {T}: Add {B} or {G}.

({T}: Add {G}.)

If you control two or more other lands, Hive of the Eye Tyrant enters the battlefield tapped. {T}: Add {B}. {3}{B}: Until end of turn, Hive of the Eye Tyrant becomes a 3/3 black Beholder creature with menace and "Whenever this creature attacks, exile target card from defending player's graveyard." It's still a land.

If you control two or more other lands, Lair of the Hydra enters the battlefield tapped. {T}: Add {G}. {X}{G}: Until end of turn, Lair of the Hydra becomes an X/X green Hydra creature. It's still a land. X can't be 0.

{T}: Add {C}. {T}: Add {B} or {G}. Llanowar Wastes deals 1 damage to you.

({T}: Add {B}.)