Hagmer, the Oldest of Wizards

When Hagmer, the Oldest of Wizards enters the battlefied, you may pay {x}. If you do, reveal top {x} cards of your library. You may put any number
of instant and sorceriy spells in your hand
revealed this way.
Whenever you cast a instant or sorcery spell,
Hagmer, the Oldest of Wizards gains Hexproof
and Indestructible until end of turn.
Whenever your opponent cast a instant or sorcery spell, put two +1/+1 counters on
Hagmer, the Oldest of Wizards