Stormsurge

2800

90 Ability Power
15 Magic Penetration
6% Move Speed

Stormraider
Dealing 25% of a champion's maximum Health within 2.5s applies Squall to them.

Squall
After 2 seconds, deal magic damage. If the target dies before Squall triggers, it damages nearby enemies.

From

Merge cost : 800

Hextech Alternator

1100

Aether Wisp

900