- Uncroaking deceased units.
- Providing combat bonuses to uncroaked units.
Croakamancy has significant limits - the uncroaked have a limited persistence before they rot down and disintegrate, and the transition to their new twilight existence robs them of a lot of their higher brain functions: Casters lose their magical abilities, warlords lose a great deal of their initiative and command skill, and regular units lose pretty much all trace of their identity. However, some abilities are maintained: An uncroaked warlord can still lead to some degree, and uncroaked flying units can still fly.
Some units, such as wiener-rammers, cannot be uncroaked.
The amount of time and attention a Croakamancer invests in uncroaking a creature has a significant effect - a mass of creatures uncroaked in a hurry will only last a few turns, but an individual or small group carefully revived can last a very long time indeed.
Glad I've fianlly found something I agree with!
Due to the facts that Wanda had to retrieve the body of Manpower Erf-b1-p3 and that she later said that Ossomer had to be captured (rather than be croaked and dragged over to her hex afterwardsErf-b2-p6) it is possible that moving a dead body from hex to hex causes it to be impossible to uncroak/decrypt.
It is likely that constructed units, such as golems, cannot be uncroaked.
With the Arkenpliers, Wanda is able to Decrypt units - to bring back the dead with all their abilities and most of their memories intact, but loyal to the caster and her side. Many casters believe this takes Croakamancy into the realm of Life magic, which is normally its antithesis. Many casters find this to be unnatural, and thus, wrong.