Pramikon, God's Aegis

When Pramikon, God's Aegis enters the battlefield, you may exchange your life total with it's toughness. If you do, Pramikon is dealt
damage in the form of -1/-1 counters.
Pramikon has reach, shroud, and can block any number of creatures each combat.
Titanfall—Whenever a creature with power 5 or greater enters the battlefield under your control, put 5 +1/+1 counters from Pramikon.