Blood Spell

As an additional cost, pay 2 life.

Target player reveals the top cards from their library
until they reveal a basic land and shuffles them back
into their library. They lose life equal to the amount
of cards revealed this way. Put a -1/-1 counter on a
target creature they control for each life lost this way.
If that creature would die this turn, it's controller
loses extra life for each -1/-1 counter on that creature.