How to beat Cassiopeia

Common role: Mid

A DoT mage who grounds you so you can't dash away, then poisons you to death.

What makes Cassiopeia dangerous

Cassiopeia stacks poison with Q and a spammable E (empowered against poisoned targets), grounds an area with W so you cannot dash out, and petrifies you with a frontal ultimate if you are facing her. She scales into an unkillable damage machine who chases you down with movement speed.

How to play against Cassiopeia

• 1Turn away from her when she ults — facing her means a full stun, turned away is only a slow.
• 2Don't dash into her W ground zone; you'll be stuck and poisoned.
• 3Punish her extremely weak, mana-hungry early game hard.
• 4She is immobile — dive her or gank; her only defence is the ground zone.

Weaknesses to exploit

• ✓No mobility — highly gankable and easy to dive.
• ✓One of the weakest, most mana-starved early laners.
• ✓Her ult only stuns enemies facing her — turn away.
• ✓Squishy: burst her before her poison ramps.

Abilities & how to counter them

What each of Cassiopeia's abilities does — and how to play around it.

• P
  妖艶な蛇行

  カシオペアは獲得するあらゆる移動速度ボーナスの効果が増加する。

  Strong: gains move speed instead of buying boots, letting her chase and kite. Weak: no boots means a flat item disadvantage — burst her when caught.

• Q
  ノクサスブラスト

  発動から一瞬遅れて指定地点に強力な毒を噴出させる。このスキルがチャンピオンに命中すると、自身の移動速度が増加する。

  Strong: applies poison and grants her move speed — her main poke. Weak: a delayed AoE circle — sidestep it to deny the poison and speed.

• W
  ミアズマ

  多数の毒霧を発生させ、その範囲に足を踏み入れた敵にスロウ効果と釘付け効果に加え、軽度のダメージを与える。釘付け効果を受けた敵は、移動スキルを使用することができない。

  Strong: a ground zone that stops all dashes so you can't escape her. Weak: fixed area — don't dash into it, and walk around the edge.

• E
  ツインファング

  毒に侵された対象に対してダメージが増加する攻撃を繰り出す。与えたダメージの一定割合分、自身の体力を回復する。また、このスキルで対象を倒すと自身のマナを回復する。

  Strong: a spammable nuke that refunds mana and shreds against poisoned targets. Weak: it needs poison on you first — cleanse the poison or don't get hit by Q.

• R
  石化の魔眼

  石化の魔眼を開放し、扇形範囲内で自身のほうを向いている敵にスタン効果を付与する。自身に背を向けている敵にはスロウ効果を付与する。

  Strong: petrifies everyone facing her for a full stun. Weak: turn away and it's only a slow — face-check her ult and turn your back.

Itemization

Magic resist and grievous wounds (she sustains off Q). Dive her immobile frame early; turn away from her ult to dodge the stun.

This guide covers Cassiopeia's core kit and playstyle — advice that holds up across patches.