Nope haven't tried overwhelm with this deck but Soul exchange is the most powerful card in a gravekeeper deck.. Twister is for the damn HHG that has infested platinum
Three oracles is a bit much. Just two is more than enough, you have steele to recycle anyway. try some choice cards like eliminating the league, mirror wall, another double summon maybe (though you have two jesters already), and magic drain.
Also, try the Restart skill instead of Power of Dark for consistency, with so many burning lands and harpie around, the yami field spell won't last anyway..
Thank you.. Unfortunately I don't have eliminating the league or magic drain but I do indeed have 3 mirror walls.. Spent all my gems on Neo impact to get those
Just keep your econs, windstorm and twister, make it 20 cards only. Soul exchange and double summon are a must. I've seen a lot of players using baggy sleeves skill since this is a tribute summon deck ;)
I was stuck with Gravekeeper deck too. Try changing the skill to Restart and see if it holds. I would remove 1 Oracle, Twister, the Gravekeeper Flat Wall magic card. I would add one more Double Summon.
I wanna build a version with Baggy Sleeves but I need the third Chief and Ishizu is stingy