Hinterland Harbor

Hinterland Harbor enters the battlefield tapped unless you control a Forest or an Island. {T}: Add {G} or {U} to your mana pool.

Sulfur Falls

Sulfur Falls enters the battlefield tapped unless you control an Island or a Mountain. {T}: Add {U} or {R} to your mana pool.

Disdainful Stroke

Counter target spell with converted mana cost 4 or greater.

Banefire

Banefire deals X damage to target creature or player. If X is 5 or more, Banefire can't be countered by spells or abilities and the damage can't be prevented.

Steam Vents

Rootbound Crag

Chart a Course

1U

Crushing Canopy

2G

Dive Down

U

Entrancing Melody

XUU

Fiery Cannonade

2R

Spell Pierce

U

Star of Extinction

5RR

Sailor of Means

When Sailor of Means enters the battlefield, create a colorless Treasure artifact token with "{T}, Sacrifice this artifact: Add one mana of any color."

Pteramander

Flying {7}{U}: Adapt 4. This ability costs {1} less to activate for each instant and sorcery card in your graveyard. (If this creature has no +1/+1 counters on it, put four +1/+1 counters on it.)

Hydroid Krasis

When you cast this spell, you gain half X life and draw half X cards. Round down each time. Flying, trample Hydroid Krasis enters the battlefield with X +1/+1 counters on it.

Breeding Pool

({T}: Add {G} or {U}.) As Breeding Pool enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

Stomping Ground

({T}: Add {R} or {G}.) As Stomping Ground enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

Shock

Shock deals 2 damage to any target.

Opt

Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.) Draw a card.

Island

({T}: Add {U}.)

Mountain

({T}: Add {R}.)