"All right!" Eden said eagerly, before considering his moves. Chess was also something that flash-teaching had barely taught him, so he had to be careful. However, military strategy was something he knew [i]slightly[/i] more about. He had to be careful; the opportunity to move first encouraged recklessness; he knew that much from Chess. 

With a gesture, using [i]his own[/i] biomass-controlling powers - turning into a tree was his primary power, not his only one - he used his two moves on his land to designate two of his creatures as his 'reserves', and a third one to act as a 'bait', moving it into a position where it can believably threaten one of Jaden's castles, but at the same time making sure that any attackers would be instantly mobbed by his reserves.