It doesn't seem to be strong even if the lower half of the body is that of a deer
This four-mana mono-green 4/3 makes every creature spell you cast with power 4 or greater cost two generic mana less, and whenever she attacks, each of those big creatures gets +1/+1 and trample until end of turn
It gives you a huge mana and tempo boost just by hitting the battlefield, and it's a natural addition to energy decks
Alternatively, you can turn your ex-oriented Water deck into a bit of a one-point deck by consistently resurrecting and playing a Manaphy
As a simple recurring body, Orochi can easily synergize with many techs due to its favorable level, type and attribute
As a card, it became legendary through Seto Kaibas ruthless use of it in the anime, where it functioned as a deck-destroying weapon that felt downright unfairand in real competitive play, that reputation wasnt exaggerated