Knight-Commander Lowain

Trample, Exalted
When Lowain attacks alone, you may tap any number of other permanents you control with Exalted, then if one or more permanents were tapped this way, Lowain can only be blocked by one creature. If three or more permanents were tapped this way, destroy target nonland permanent with
mana value less than Lowain's power. If six or more permanents were tapped this way, search your library for a permanent card with Exalted, put it into your hand, then shuffle your library.