Arcane Torrent

From WoWWiki

Arcane Torrent
Arcane Torrent (Racial) Instant cast Silence all enemies within 8 yards for 2 sec. In addition, you gain 10 Mana for each Mana Tap charge currently affecting you.
Usable by
Class	All
Race	Blood elf
Properties
Type	Offensive
School	Arcane
Cooldown	2 min
Related debuff
Magic Arcane Torrent Silenced. Duration: 2 sec

Deprived of the Sunwell, the sin'dorei have learned new techniques for manipulating arcane magic.^[src]

A Blood elf racial ability.

Notes

Mana return scales with level; Energy return does not scale with level.

(Given values indicative of a level 1 character. At level 70, Arcane Torrent gives 161 Mana for each charge. The formula is roughly 2.17 * level + 9.136)