How youre going to use Doomsday varies with the format (Cube, Vintage, EDH), but youll usually want a card like Laboratory Maniac or Thassa's Oracle and draw spells like Gush or Gitaxian Probe
After all, Sir Charles had woken me up the night before by lowering his ever-fragrant butt onto my face at three in the morning
His willingness to chant enthusiastically at top volume about anything, at any time, for any reason, is the stuff of legends
One of the difficulties in trying to make creatures have an impact on Standard is that they normally have to have an immediate effect on the game
Method two was to use it to make good use of excess land and to finish off particularly problematic creatures, combined with a little extra reach
The fact that it gives the caster a ton of mana in return makes it miles better than the already pretty powerful Counterspell