Meria's Outrider

Reach
Domain — When Meria's Outrider enters, it deals damage to each opponent equal to the number of basic land types among lands you control.

Woodland Chasm

({T}: Add {B} or {G}.)
Woodland Chasm enters tapped.

Horizon Spellbomb

{2}, {T}, Sacrifice Horizon Spellbomb: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
When Horizon Spellbomb is put into a graveyard from the battlefield, you may pay {G}. If you do, draw a card.

Sulfurous Mire

({T}: Add {B} or {R}.)
Sulfurous Mire enters tapped.

Relic of Progenitus

{T}: Target player exiles a card from their graveyard.
{1}, Exile Relic of Progenitus: Exile all graveyards. Draw a card.

Volatile Fjord

({T}: Add {U} or {R}.)
Volatile Fjord enters tapped.

Skred

Skred deals damage to target creature equal to the number of snow permanents you control.

Snow-Covered Forest

Arctic Treeline

({T}: Add {G} or {W}.)
Arctic Treeline enters tapped.

Gaea's Might

Domain — Target creature gets +1/+1 until end of turn for each basic land type among lands you control.

Into the North

Search your library for a snow land card, put it onto the battlefield tapped, then shuffle.

Nylea's Presence

Enchant land
When Nylea's Presence enters, draw a card.
Enchanted land is every basic land type in addition to its other types.

Matca Rioters

Domain — Matca Rioters's power and toughness are each equal to the number of basic land types among lands you control.

Ancient Grudge

Destroy target artifact.
Flashback {G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Alpine Meadow

({T}: Add {R} or {W}.)
Alpine Meadow enters tapped.

Snow-Covered Plains

Snow-Covered Swamp

Exploding Borders

Domain — Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. Exploding Borders deals X damage to target player or planeswalker, where X is the number of basic land types among lands you control.

Snow-Covered Mountain

Wandering Stream

Domain — You gain 2 life for each basic land type among lands you control.

Snow-Covered Island

Might of Alara

Rimewood Falls

({T}: Add {G} or {U}.)
Rimewood Falls enters tapped.

Echoing Ruin

Destroy target artifact and all other artifacts with the same name as that artifact.

Sunbathing Rootwalla

Domain — {3}{G}: Until end of turn, Sunbathing Rootwalla gets +1/+1 for each basic land type among lands you control. Activate only once each turn.