Fury:Rek'Sai generates 5 Fury every time she lands a basic attack and 10 Fury every time she lands Queen's Wrath, Unburrow or Furious Bite, plus 2.5 additional Fury per enemy hit beyond the first. Rek'Sai loses 20 Fury per second if she has not gained any in the last 5 seconds.
Fury of the Xer'Sai: As long as Rek'Sai remains burrowed, she expends 20% of her accumulated Fury every second to heal herself, up to a maximum of 25 - 450 (based on level) over 5 seconds if she burrowed at 100 Fury. This stops once Rek'Sai consumes all of her Fury or returns to full health.
Fury of the Xer'Sai is a self-targetedbuff that triggers whenever Rek'Sai casts Burrow and has Fury, or after she completes Void Rush, and remains for 6 seconds.
Unburrowed - Active:Rek'Sai's next three basic attacks within 5 seconds deal bonus physical damage to her target and all surrounding enemies.
Unburrowed - Active:Rek'Sai burrows into the ground, reducing her sight range and disabling her basic attacks while gaining 15 / 20 / 25 / 30 bonus movement speed, immunity to unit collision, access to an alternate set of basic abilities and Tremor Sense.
With Tremor Sense activated, enemy and neutral units that move near Rek'Sai have their position revealed to her and her allies every 1.5 seconds. This does not grant sight, but can be seen through Fog of War.
Burrowed - Active:Rek'Sai bursts out of the ground, dealing physical damage to surrounding enemies and knocking them up for up to 1 second, based on their proximity to her upon emerging. Enemies cannot be affected again by Unburrow for a few seconds.
Both Burrow and Unburrow have no cast time and do not interrupt Rek'Sai's previous orders.
During Burrow, Rek'Sai gains Tremor Sense, which will alert her of the location of enemy units when they move, displayed by rings on the ground, with champions identified with much larger rings than other units. It does not grant sight of the unit, nor does it directly alert Rek'Sai of who it is she is tracking. Enemies who stand still while Rek'Sai is nearby are insensible to Tremor Sense.
Rek'Sai will hear a sound effect whenever she detects an enemy champion with Tremor Sense.
If Rek'Sai tries to basic-attack an enemy while Burrowed, she will automatically Unburrow before attacking.
Though undocumented, Unborrow does slow the creep/champions that it knocks up for a short time.
Unburrowed - Active:Rek'Sai bites the target enemy, dealing physical damage that is increased by 1% for every point of current Fury. If Rek'Sai has full Fury, Furious Bite deals true damage instead.
Burrowed - Active:Rek'Saidashes in the direction of the cursor, leaving behind two connected tunnel entrances. She can interact with either entrance to traverse the tunnel again, but each tunnel shuts down for a few seconds after being used, momentarily preventing further traversal.
Rek'Sai's tunnels last for up to 10 minutes and can have up to 8 pairs of tunnel entrances active on the map at the same time. Enemy champions can destroy a tunnel by standing on either entrance for 1.5 seconds.
Enemy champions that destroy a tunnel are granted 5 gold each.
Although Rek'Sai can use a tunnel both when she is burrowed and unburrowed, she is considered to be burrowed while inside one - she will gain her burrowed skill set (although it is unusable), have reduced vision and have access to Tremor Sense. She will resume her previous stance when the tunnel ends.
The healing from Fury of the Xer'Sai, however, will not take place while using a tunnel unless Rek'Sai was burrowed prior to entering it.
Tunnels that are destroyed while Rek'Sai is in transit will not prevent her from completing the movement.
Tunnel entrances are always visible on the minimap to allied champions. Enemy champions must sight an entrance at least once before it becomes visible and sighting one entrance will not automatically reveal the location of the other.
Tunnel formation behaves similarly to blink abilities in that if the endpoint tunnel would be in impassable terrain, Rek'Sai will instead create the endpoint tunnel at the closest available spot of passable terrain.
Rek'Sai can interact with tunnel entrances even if there is terrain between them, as long as the entrance is close to the wall and the wall is sufficiently thin.
COOLDOWN: 180 / 140 / 100
Passive:Rek'Sai gains bonus attack speed.
Bonus Attack Speed: 20 / 40 / 60%
Active:Rek'Sai targets one of her tunnel entrances and channels for 1.5 seconds. Upon completing the channel, she burrows into the ground and dashes to the target tunnel, becoming untargetable for the duration. This does not shut down the selected tunnel.
In addition to disabling effects, damage from champions and turrets interrupt Void Rush, putting it on an 8-second reduced cooldown.