List of Compact Combos

[MaximumC]

Battlefield Thaumaturge and Descent of the Dragons is kind of a combo.

There's a blurry line between combo and synergy, but a two card combination which might allow you to make 4+ 4/4s if you have an army of 1/1s out already... I dunno, seems more like a synergy than a real combo. I mean, Thaumaturge combos like this with lots of cards. Take Turn to Swine, for example.