Elvish Spirit Guide

Exile Elvish Spirit Guide from your hand: Add {G}.

Pyretic Ritual

Simian Spirit Guide

Exile Simian Spirit Guide from your hand: Add {R}.

Jaya's Immolating Inferno

(You may cast a legendary sorcery only if you control a legendary creature or planeswalker.)
Jaya's Immolating Inferno deals X damage to each of up to three targets.

Rosheen Meanderer

{T}: Add {C}{C}{C}{C}. Spend this mana only on costs that contain {X}.

Snow-Covered Forest

Snow-Covered Mountain

Mox Emerald

Taiga

Channel

Until end of turn, any time you could activate a mana ability, you may pay 1 life. If you do, add {C}.

Black Lotus

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