Xhorhasian Moorbounder

Whenever this creature attacks, reveal the top card
of your library and put it into your hand. You lose
life equal to that card's mana value if this creature
isn't saddled. Otherwise, each opponent loses that
much life.

Saddle 3 (Tap any number of other creatures you
control with total power 3 or more: This Mount
becomes saddled until end of turn. Saddle only as a
sorcery.)