Destruction

Whenever you cast a Destruction spell, you gain
an experience counter.
1 Destruction spells cost {1} less to cast.
2 When you level up, reveal the top card of your library. If it's a destruction spell, put
it into your hand.
3, 4 Whenever a Destruction spell deals damage,
it deals that much damage plus 1 instead. It deals
plus 2 instead, if the level is 4 or higher.
5 Whenever you cast a Destruction spell, copy it.
You may choose new targets for the copy.