Lotus Petal

{T}, Sacrifice Lotus Petal: Add one mana of any color.

Metallic Sliver

Caldera Lake enters the battlefield tapped.
{T}: Add {C}.
{T}: Add {U} or {R}. Caldera Lake deals 1 damage to you.

At the beginning of your upkeep, you may look at the top three cards of your library, then put them back in any order.

Skyshroud Forest enters the battlefield tapped.
{T}: Add {C}.
{T}: Add {G} or {U}. Skyshroud Forest deals 1 damage to you.

Scabland enters the battlefield tapped.
{T}: Add {C}.
{T}: Add {R} or {W}. Scabland deals 1 damage to you.

{T}: Add one mana of any type that a land you control could produce.

At the beginning of your upkeep, Jinxed Idol deals 2 damage to you.
Sacrifice a creature: Target opponent gains control of Jinxed Idol.

Any player may cast creature spells with mana value 3 or less without paying their mana costs and as though they had flash.