While this "combo" is interesting and probably very boring for my opponents, It requires an Ideal situation and is pretty darned easy to stop. but if it goes off you take "infinite" turns, limited only by your opponent's health.
Very simple combo
The Transcendent + Time bug + Replicator's gambit
Combo Step 1: Replicate a time bug and transform the Transcendent. When you draw, you fish out your replicated time bug. Alternatively, have a time bug and Transcendent out, and play Gambit on time bug, first effect shuffles it in, second effect lets you fish it out.
Combo step 2 Use your next turn to fish out another Gambit, and use it on a time bug (same one, different one, depends on the situation, I like repeating the same one) you will very quickly have a time bug swarm and a constant influx of turns, if you can damage your opponent consiseantly.
Step 3: Profit.
Assuming the time bug and Transcendent live long enough for time bug(s) to attack next turn, (easily done with mastery of time, stoneskin, countermagic, etc) you can attack with all of them to get 3 extra turns. (Assuming also they are not blocked.)
I managed to do this vs AI fairly consistently.
Deck name: Transcending Time
Champion Betram Cragraven (for blockers)
12 Sapphire Shard
12 Diamond Shard
4 Replicator's Gambit
4 Ascetic Aspirant
4 Time Bug
4 Inner Conflict
4 Solitary Exile
4 Time Ripple
2 Mastery of Time
I packed this deck full of removal, so I can stay alive enough to combo off, and so I can make sure I can hit when I do pull off the combo.