Saiuto-san

Defender, haste
Creatures and planeswalkers attacking or being blocked by Saiuto-san do not untap during next untap phase.
{w}: Look at the top card of your library.
{b}: Look at the top card of opponent's library.
{t}, {w/b}{w/b}: Compare combined mana cost of top cards of your and target opponent's libraries. If yours is greater, you may reveal those cards, draw
two cards and untap Saiuto-san.