MTG Warhammer 40k Secret Lair spoilers have been revealed in an unboxing YouTube video
The first thing needed is a 3" long by 1/4" - 20 brass machine screw, nuts, and washers
With a few cards like Night Shift of the Living Dead, you can make little adjustments to your dice roll, or even the enchantment like Barbarian Class to reroll your dice rolls to help ensure you get the results you want
The most popular, and arguably the strongest, is Iroh, Grand Lotus
Archangel Elspeth Archangel Elspeth grants divine inspiration to your best creature, providing a fairly strong finisher with which to close the game even if Elspeth doesnt survive the downtick
Phyrexian Rebirth 4WW Sorcery Destroy all creatures, then put an X/X colorless Horror artifact creature token onto the battlefield, where X is the number of creatures destroyed this way