Arena (MH4)

{t}: Add 1 of any colour to your mana pool
{4}{t}: Choose any number of players and/or permanents that have counters on them, then
remove one of each kind of counter that are
already there on these players or permanents
There are two exits out of base camp, leading to
opposite ends of the map. Features numerous small
ledges that can be jumped off of, facilitating mounting attacks