for that combination, I liked it in my Grenzo, Dungeon Warden deck
Be careful in attempting to use Into the Void because your entire hand will be discarded at the end of turn upon its activation, but sometimes that extra draw will allow more draw options ending in having all Exodia cards in hand before Into the Voids discarding effect activates
Because none of the Doctors synergize super well with each other, though, Clara is essentially a six-mana version of Spark DoubleSpark Double that you've always got access to in the command zone
A more modern design would have a discard attached to that card draw
It replicates the rules of the card game to a T and its easily the most fledged out version to ever be released, with over 1000 cards to pick from
On one hand we could go Naya, and on the other Bant