Earthwalker. Play on an opposing realm during phase 3. Acts as an ally for any champion attacking the realm. Stays with razed realm, if not discarded through combat, which cannot be rebuilt while Locust Plague is attached to it.
Copyrights:
TSR
Wizards of the Coast
The Locust Plague in a very unique ally.
First off, it is not played into battle normally; it must be played during phase 3. The Plague must be attached to an opponent's realm, though this realm doesn't have to be one it can attack (can still be attached to a realm restricting earthwalkers), and can even be razed. Any champions attacking that realm (including champions attacking when the realm is razed, like The Spider (65/BR) get the benifit of having this +5 ally help (unless the Plague is restricted from attacking there). However, in battle is when the ally is the most risky, as it is vulnerable to any method of destruction while in battle.
The most important facet of the Plague is that a razed realm it is attached to cannot be rebuilt (in can, however, be replaced). This is a great method to stop someone from rebuilding their realms with events to win the game. Therefore, since rebuilding is a very common sight in tournament games, this card will show up in tournaments.
This can also show up in fun decks, though its weakness in combat means it won't be as strong. I only wish it could be attached in phase 5, after razing a realm.