Spectral Searchlight
{3}
Artifact
{T}: Choose a player. That player adds one mana of any color they choose.
Stadium Vendors
{3}{R}
Creature -- Goblin
3/3
When ~this~ enters, choose a player. That player adds two mana of any one color they choose.
Valleymaker
{5}{R/G}
Creature -- Giant Shaman
5/5
{T}, Sacrifice a Mountain: ~this~ deals 3 damage to target creature.
{T}, Sacrifice a Forest: Choose a player. That player adds {G}{G}{G}.