Between flashback and the ability to discard multiple copies of a card at once, the ceiling is lost in the clouds
Gamble is another great tutor that can pick up the Thumb or anything else you need at the time
Theres one easy way to accomplish this: silica gel packets
It may be a creature, but there are very few instances where a player should use Llanowar Elves, or any mana dork creature, to attack or block
A bunch of other wild stuff happens, but I'm not going to spoil that here, instead let's get to the video so you can see the insanity for yourself
Mana Crypt is simply unbelievable on rate, so as long as you are careful, its easy to reap the rewards from the additional mana provided and win the game before the drawback becomes relevant