I would use scared girls original rainbow, un-upped, its on the original wiki,
it looks something like this
4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4vj 4vj 4vj 4vj 4vj 4vj 4vm 52n 52r 52r 55r 55r 55r 58t 5c6 5c6 5fa 5if 5oj 5ol 5rl 5rl 5rl 5rl 5rp 5rp 5rp 5rp 5rp 5rp 5up 5up 5up 61t 61t 61t 61t
Edit:
while it is very slow id will win 9/10 times, and 4-5 of those times it will have mastery
I've been using something very similar to this for a long time - Eternity instead of Owl's Eye, Purple Nymph instead of 4 Sundials - and it has
an even better winning ratio. Nymph for healing, Otys + FFQ + Boneyards for lots of Bonewall, which will only get damaged by weapons and
creatures you can't target with the Nymph. Fallen Elf for mutating you Skellys or creatures way too big to devour.
The deck is large enough for you not to be forced to rewind creatures infinitely, but Eternity is useful for cases like you get a mutant 1/3 Sillurian
dragon with Light... Rewind, play and deal way more damage
or to protect valuable poisoned, frozen etc. creatures.
The only time it could loose is against mono
, as you may not have time to create an army fast enough to heal damage(with Bonds)
done by immortal creatures, which you have absolutely no way to destroy or Antimatter(with the Nymph).
Anything else than
is an automatic win + mastery, unless you get very unlucky with the cards you get at the beginning.
The only major problem would be getting the Nymph, but... I once got lucky with the Oracle and am now getting profits of it
Edit:
Now it looks like this:
4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4sa 4vj 4vj 4vj 4vj 4vj 4vj 4vm 500 52n 52r 52r 55r 55r 55r 58t 5c6 5c6 5fa 5if 5oj 5rl 5ro 5rp 5rp 5up 5up 5up 61t 61t 61t 61t 7q5 7q5 7q5