Jibril, Youngest of the Flügel

Jibril, Youngest of the Fluegel can't be countered
Flying, Hexproof
When you cast this spell destroy all creatures they
can't be regenerated.
At the beginning of your upkeep put an age
counter on Jibril, Youngest of the Fluegel. If this
card had 3 or more age counters on it transform it
into Jibril, Protector of Knowledge.