Riverchurn Monument

{1}, {T}: Any number of target players each mill two cards. (Each of them puts the top two cards of their library into their graveyard.)
Exhaust — {2}{U}{U}, {T}: Any number of target players each mill cards equal to the number of cards in their graveyard. (Activate each exhaust ability only once.)

{1}, {T}: Cualquier cantidad de jugadores objetivo muele dos cartas cada uno.
Agotar — {2}{U}{U}, {T}: Cualquier cantidad de jugadores objetivo muele una cantidad de cartas cada uno igual a la cantidad de cartas en su cementerio.