Keixa, Master Trapper

{u}{b},{t}: Target opponent reveals their hand. You choose a nonland card from it. That player must
cast that spell this turn if able.
Traps you cast can't be countered.
Whenever you cast a trap, if an alternate cost was
spent to cast it, look at the top six cards of your library. You may reveal a trap from among them
and put it into your hand, put the rest on the
bottom of your library in a random order.