mtg mirrodin besieged booster box / * It will be available in intro packs Mirrodin Besieged Bundle / Fat

Repeat until every card has been picked

Every card you draw after that increases the odds that the next card you draw is Ob Nixilis

Scry one, or surveil one, as explore more reasonably is when not hitting a land is a low amount of card quality

Sacrifice Felidar Guardian with Vivien on the Hunt, search for Karmic Guide and reanimate Felidar Guardian and use his effect on Vivien on the Hunt again

On the other hand, playing this card as early as possible gives you the best chances to move forward

Any time an opponent monster directly attacks you, you can special summon it in defense position, negating the hit to your life points