Sage Art: Rhongomyniad

Avalon's Version
After entering Daeva Sage Mode, Avalon generates a spear-like weapon of senjutsu chakra from his Yggdrasil Seal, which he may then utilize as a spear for close-quartered combat, or a javelin for a long-ranged assault. This weapon passively absorbs natural energy into its structure, and gluttonously absorbs senjutsu chakra upon contact to strengthen its cutting ability. Avalon calls it the "Hermit Reaper" due to this special ability. it is also due to this ability that he'd prefer to throw it, as it limits the amount of chakra necessary for the Yggdrasil to properly regulate, and insulate natural energy through his chakra network. If immediately thrown, the weapon will possess the strength of a regular, steel javelin unless it absorbs senjutsu chakra from another technique, which it will draw in like a black hole.

Azazel's Version
As similar to Avalon's version, Azazel generates a spear-like weapon of senjutsu chakra in its hands, which is also capable of absorbing natural energy into its structure and countering other senjutsu techniques. However, it cannot be wielded into close-quarters due to the excess of chakra he's already imbued it with, and is hence thrown, capable of amassing natural energy into its structure while in turbulence. This spear does not pierce like Avalon's version does, instead violently exploding, the magnitude of which depending upon the amount of senjutsu chakra stored within its construct. Generally the greater the distance thrown, the more devastating the explosion.