Sylph

The Sylph is a passive mob added by Ars Nouveau. It usually spawns in forest biomes and its variants. It is also known as a Whirlisprig in some versions. 
A wild Sylph can also be tamed by growing a tree with bonemeal near it. Once tamed, it drops sylph shards that can be crafted into a sylph charm. A sylph charm can then be used on a summoning crystal to summon it as a tamed sylph. A tamed sylph will drop random, nature related items into a chest adjacent to the summoning crystal. The quality of drops depends on the variety of nature related blocks near the summoning crystal.