Toaster is a T2 pop-up long range plasma battery. Built by all T2 land/air cons it is able to protect your defence line from artillery units and dismantle enemy’s defense line.
Set to Hi-traj it deals more AoE damage, but shoots slower.
It is a great way to stop your enemy from building an Annihilator thanks to its lower costs and buildtime.
Another use case is to stop snipers, which get outranged by these. Be sure to provide good line of sight for it, to improve targeting.