Skarner's was reworked in Patch 14.7, and he's been closely monitored by League of Legends developers ever since. After his Patch 14.8 changes increased his win rate in the solo queue, he's set to receive a few nerfs in Patch 14.9.
NEW PATCH 14.16 CHANGES! – League of Legends
Patch 14.8 went live on April 17th, immediately improving Skarner’s win rate after making a bunch of tweaks to the scorpion champion. Now, it looks like more changes are on the table, as revealed by League content creator Spideraxe.
Shortly after the changes went live, the creator found additional changes that had been added to the PBE servers and shared them on X. It turns out that Skarner already has three nerfs planned, one each for his passive, Q, and W.
When it comes to his passive attack, his health damage is reduced from 7-12 percent max health to 7-10 percent. This means that he will deal significantly less damage with his other attacks, as they are amplified by his passive attack. His Q's health ratio has also been reduced from six to five percent bonus health, and his W's base damage has also taken a hit, reduced from 50-150 to 50-130.