Voidslime - [Foil] Dissension (DIS)Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.) "It is technically an ooze, but its lifespan measures only seconds. In that short time, its appetite for magic is extraordinary." Simic research notes

and all of Yavimaya is its flower

Mounted cinders circle the blasted peak at Kulrath

If a red source you control would deal damage to an opponent or a permanent an opponent controls

and creature types

Whenever you sacrifice a permanent

this creature enters the battlefield with three +1/+1 counters on it

You'd still put a match to something rather than understand it

Flash Commander creatures you control get +2/+2

Sacrifice Shambling Shell: Put a +1/+1 counter on target creature

Until end of turn

where X is the amount of mana spent to cast it

A weapon of darkness for a warrior of light