On rune management says on card ability: DRAGONBARK: when this unit is deployed its spends the first 4 turn as a relic with 20hp.When this unit dies it becomes the same tree relic. So when my dragonbark dies it no become the relic again....its a bug?or what? ty for the attention.
It should do that and always has for me. Maybe something else interfered with it, like getting killed by a Swarm Champ or it was affected by some kind of ability removal like Fading Recollection.