Aletheian Horde

Shroud, indestructible, trample
{10}{w}{w}{w}{w}{w}, {t} - Convert and Tithe (All
creatures are moved by your cause and they bring a
tithe with them. You gain control of all opponent's
creatures, artifacts, and enchantments for the rest of
the game. This ability continues to take effect until the
start of the next upkeep.)
This ability cannot be countered.