Marsh Flats [Zendikar Rising Expeditions] Commander Anthology Volume II put that many +1/+1 counters

put that many +1/+1 counters on Tetravus

Greven has attained his powerful rank through a series of underhanded schemes and assassinations

−1: You may sacrifice an artifact

Each player loses 1 life for each attacking creature they control if {B} was spent to cast this spell

{T}: Create a token that's a copy of target nonlegendary creature you control

Marsh Flats [Zendikar Rising Expeditions] Commander Anthology Volume II put that many +1/+1 countersSet: Zendikar Rising Expeditions Type: Land Mythic Cost: {T}, Pay 1 life, Sacrifice Marsh Flats: Search your library for a Plains or Swamp card, put it onto the battlefield, then shuffle your library.