Mountain

Virulent Sliver

All Sliver creatures have poisonous 1. (Whenever a Sliver deals combat damage to a player, that player gets a poison counter. A player with ten or more poison counters loses the game.)

Striking Sliver

Sliver creatures you control have first strike. (They deal combat damage before creatures without first strike.)

Basal Sliver

All Slivers have "Sacrifice this permanent: Add {B}{B}."

Cleansing Wildfire

Destroy target land. Its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle.
Draw a card.

Muscle Sliver

Swamp

Explore

You may play an additional land this turn.
Draw a card.

Predatory Sliver

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Gemhide Sliver

All Slivers have "{T}: Add one mana of any color."

Darkmoss Bridge

Darkmoss Bridge enters tapped.
Indestructible
{T}: Add {B} or {G}.

Forest

Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.