Compared to Luden echo/ Liandries, Spell binder does very little damage. (Some maths)

Lets just say on average, most mages do about 200%- 250% AP damage on a full rotation of spells. Now, after charging Spell binder to 100 stack, you then get 80 more AP upon activation.

80 AP * 200% ap scaling is an extra 160 magic damage. Even at 300% ap scaling, thats a whooping 240 extra magic damage.

Compared to Ludens passive, you get 100 magic damage plus 10% ap.

If the mage had 800 AP Ludens does 180 magic damage.

The big contrast is how easy it is to access the extra damage from Ludens, while spell binder take forever to charge for very almost the same damage.

I could probably proc Ludens, 10 times more than it would take to stack spell binder to 100. Liandries does about the same as Luden and more depending on the target health and how long the burn last.

Morello can deny 100-800 health in healing depending on the champ.

And having 120 vs 90 from ludens doesn't make much of a difference as Ludens can be used with transcendence to increase the AP. And the movespeed active is pitiful as it decays. And the best part, after taking forver to stack the item, the active is only 4 seconds long. Compared to Essence reaver that last for 6 seconds.

Overall, spell binder is in a terrible state and is basically a noob trap item. Waste of gold if purchased.