While there is a face-down Defense Position monster(s) on your side of the field, no player can select this card as an attack target. Each time a monster on your side of the field is Flip Summoned, inflict 300 damage to your opponent.
This card can really give that extra burn damage. Since statue deck is quite trap intensive using Odion chain reaction the burn damage is sweet bonus. Plus 1600 atk is not bad it can hit some cards when its needed. Especially when statue deck provide a lot of opportunity in direct attacks. Well its a nice alternative to have overall
The problem with this card is that Guardian Statue/Clown Control decks struggle to build up field presence. Every turn you need to put a monster on field to protect and keep it on field until you can return your opponent's monster to hand. A turn used summoning Grave Ohja is an extremely dangerous turn. If it gets overwhelmed you're going to deal with 2 monsters the next turn and unless you open Etaqua you're screwed afterwards. All of this only for some measly burn damage.
Don't bother with this. As much as I dislike how PTW Guardian Control is, the deck is very skill intensive and Ohja is a bad card.
added three of these bad boys to my statue deck and combos well with feint plan. Opponent can never attack you and you send their monsters back and as an added bonus -300 to their LP for flip summoning your statue.