T1 life lock

[Deathseide]

{swamp}, {mana crypt}, {dark ritual}x2, {deathrender}, {bile urchin},  {Platinum Emperion}.

[Quackmaster5]

Good combo but very tight hand. As is the mana crypt even legal since its not from an actual set and a special set?

[Double-O-Scotch]

Mana crypt is totally legal...
Edit: depending on the format...

[vary712]

{path to exile}

[Deathseide]

Of course everything can be countered, that is not what the combo corner is about, but rather this section is for those who think up combos they want to share.
Besides, how often do you play decks with that card in it?