Cassadine e skill is accumulated when a nearby hero (released by himself) casts spell skills. Players can accumulate E skills by supporting teammates or frequently releasing skills themselves.

When accumulating E skills, Casadin will absorb energy (one layer at a time). When the charging is completed (six layers need to be absorbed before it can be released), the absorbed energy can be converted into pulses, causing damage to the enemy in the front cone area, slowing down 1 sec.

An introduction to cassadine's plays.

Cassadine has multiple instrument routes. He can become a mage through mana and spell strength equipment, or he can use cooling and spell resistance equipment against other wizards. Cassadine's ultimate skill has many uses, and the cooldown is shorter than most ultimate skills. You can use it often. Casadin needs to get as much gain as possible from the ancient golem (blue BUFF) to offset the increased mana cost of void walking.