Yosharian
Arcane
I dunno though, Icy Prison gets +4 DC from Elemental Focus and Water Robes... That's significant. And it still affects targets somewhat on a successful save. And Mass Icy Prison at level 9.. GGConjuration is old hat, Evocation for Icy Prison and Necromancy for Wail shenanigans
Icy Prison is what, spell level 5? And single target? LOL. Conjuration dominates the battlefield with aoe CC effects right from the very first levels. AND ignores Spell Resistance.
Chains of Light admittedly come a spell level later but are better then Icy Prison due to no SR check.
As for Wail... end game only and be extra careful not to kill your own party? I'll pass.
Wail is just for fun really