Mycoloth [Commander 2015] Conspiracy Set: Scars of Mirrodin Type:

Set: Scars of Mirrodin Type: Artifact Rarity: Rare Cost: {3} Imprint — When Semblance Anvil enters the battlefield

They can't be regenerated

we must start by emptying it

put one of those cards on top of your library and the rest on the bottom of your library in any order

Mycoloth [Commander 2015] Conspiracy Set: Scars of Mirrodin Type:Set: Commander 2015 Type: Creature Fungus Rarity: Rare Cost: {3}{G}{G} Devour 2 (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with twice that many +1 +1 counters on it.) At the beginning of your upkeep, create a 1 1 green Saproling creature token for each +1 +1 counter on Mycoloth.