Lotleth Troll [Commander 2015] Tenth Edition it produces mana of a

it produces mana of a color of your choice instead of any other type

Stones fly

Set: Time Spiral Timeshifted Type: Sorcery Rarity: Rare Cost: {1}{G} Target player shuffles up to three target cards from their graveyard into their library

that player mills that many cards

which possess the stability of ancient mountains

Lotleth Troll [Commander 2015] Tenth Edition it produces mana of aSet: Commander 2015 Type: Creature Zombie Troll Rarity: Rare Cost: {B}{G} Trample Discard a creature card: Put a +1 +1 counter on Lotleth Troll. {B}: Regenerate Lotleth Troll. He lurks in the undercity, eager for the corpse haulers to unload their rotting cargo.