At the start of either player’s Movement phase, Sylvan Hunters can sprout a thick weave of thorned branches. Until the end of the turn, they cannot voluntarily move, but counts as being in Hard Cover.
Source: Warhammer Armies Project: Unofficial 9th Edition (v2.2)
At the start of either player’s Movement phase, Sylvan Hunters can sprout a thick weave of thorned branches. Until the end of the turn, they cannot voluntarily move, but counts as being in Hard Cover.