Upon taking fatal damage, Sion briefly becomes untargetable and enters a frenzy, restoring himself to 100% of his maximum health but losing 2 - 19 (based on level)health every 0.25 seconds, increasing by 1.4 - 13.3 (based on level) per subsequent tick.
Sion can freely move and use basic attacks during this time, gaining 100% life steal, attacking at 1.75 attack speed and dealing 10% of his target's maximum health as bonus on-hit damage, capped at 75 against minions and monsters.
Sion cannot cast any of his standard abilities while in this state but can cast Death Surge using any learned ability.
STATIC COOLDOWN: 100
Active:Sion gains 50% bonus movement speed that decays over 1.5 seconds.
However, Mordekaiser'sChildren of the Grave will not take control of Sion until after the reanimation has expired, meaning that if the reanimation lasts long enough, Children of the Grave will fail to produce a ghost of Sion.
The ticks Sion will stay in his frenzy are roughly given by the formula T = [3.7195 + 2.8571 * M / (L+1)]^0.5 - 1.9286. Where M is his maximum health and L his level.
If Sion gains a buff (such as Crest of Cinders) during Glory in Death's reanimation, he will not lose that buff when the reanimation expires.
First Cast:Sionchannels for up to 2 seconds in the direction of the mouse cursor, increasing Decimating Smash's damage over the duration, up to 300%, and its range over the next second. If the channel is interrupted, Decimating Smash goes on a reduced 2-second cooldown.
If Decimating Smash was charged for less than 1 second, Sionslows all enemies in the area by 50% for 0.25 seconds. If Decimating Smash was charged for at least 1 second, he knocks up all enemies hit for 1.25 - 2.25 seconds, based on how long Decimating Smash was channeled.
If the target is a minion or non-epic monster, they are knocked back, dealing 30% increased damage to all enemies they pass through and slowing them by the same amount for 2.5 seconds. Projectile enemies stop upon colliding with terrain or reaching the end of their trajectory.
First Cast:Sion charges in the target direction for up to 8 seconds, during which he cannot cast abilities nor attack, but is immune to all crowd control. Sion's trajectory updates itself toward the cursor over the duration, but his turn rate is decreased.
Second Cast:Sion halts his charge and slams the ground after a brief delay, dealing physical damage to nearby enemies and enemy turrets. If Sion stops directly in front of narrow terrain, he dashes over it.
If Sion collides with an enemy champion, structure, terrain, or charges for the full duration, he slams the ground, dealing physical damage to nearby enemies and turrets, briefly stunning him for structure and terrain collision.
Sion's bellows can be heard by all players globally.
Turn Rate is a term carried on from DotA. This represents a ratio that is granted to calculate the time required to turn into a commanded direction. Turn Rate is traditionaly measured on the time required to turn 180º and expressed in radians per 0.03 seconds, thus takes π (~3.14) radians to take a 180º turn.
The Turn Rate's equation is (0.03 × π) / T = t. Where T is the Turn Rate and t the time required to turn.
In the hypothetical case of modifying a unit's time to turn, the modifier will be directly multiplied to the base Turn Rate.
The Champion's time to turn is instant, despite this is not to imply zero, rather be that none possess a Turn Rate. Unstoppable Onslaught just grant such to Sion over the ability's duration.
Unstoppable Onslaught's pull effect is considered a knockup for the purpose of Last Breath.
If Sion hits an already placed Taliyah ult, his ult will not be cancelled. This might be a bug.
Unstoppable Onslaught can damage enemy structures.
While Unstoppable Onslaught is active, Sion's movement speed is hard capped at 950. As a consequence of this, building movement speed items will only cause him to gain ground over the initial acceleration and does not grant a significant increase in total distance travelled.
If Sion has a movement speed over 950 when he casts Unstoppable Onslaught, he will actually suffer a decreased movement speed.