Yggdrasil Seal

The Yggdrasil Seal takes on the appearance of a tree on the user's chest. it has the ability to passively absorb natural energy, allowing the user to convert it into senjutsu chakra. The daevas invented this seal after studying the Cursed Seal and a certain clan's ability, the design influenced by a holy tree introduced in exotic cosmology. As it is constantly absorbing natural energy, the user's chest must always remain physically exposed, else the absorption effect will be reduced (if not stalled entirely); the backside must also be exposed, from which excess natural energy is exerted to prevent the user from turning into a daeva-mutant themselves.

Avalon utilizes this seal in order to enter Daeva Sage Mode as maintain it for prolonged periods of time without being hindered by one of its disadvantages in expending twice as much senjutsu chakra as other Sage Mode forms.