Frazer's Research Facility

Frazer's Research Facility enters tapped.
If you would discard, you may discard cards to
the top of your library instead of your graveyard.
{t}: Add {u}, {b}, or {r}.
{3}{u}{b}{r}, {t}: Each player discards their hand
and draws equal to the greatest number of cards
discarded this way, then you may draw two cards.