This God Power transforms a forest into an army of fighting trees. You can only invoke this God Power near trees. If you target a lone tree, you may get a lone monster, so you are better off using this power near forests. The trees are not under your control, but they will persist until killed and will not leave the general area in which they are summoned. They are much stronger against buildings than against units. To invoke Walking Woods, left click on the Walking Woods icon, then target it on a forest near the enemy you want to attack. You must have <link="topic:line of sight">line of sight</link> to at least one tree in the forest you are targeting.
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