Using the Undying mechanic, Yawgmoth can quickly get into infinite combo situations where he continuously draws cards by sacrificing Undying creatures
Lakeside Shack Land Lakeside Shack enters tapped unless a player has 13 or less life
Reprints & Supply Risk The Pokemon Company can reprint any set without warning
Her ability to Summon herself is not used too often, but it can definitely come up for extra Tribute fodder or Link/Xyz Material
If you go second and its your first turn, draw 8 cards instead
Additionally, it may be a portmanteau with labrys, a term for double-bladed axes (such as the one wielded by "Lovely Labrynth of the Silver Castle"), which are an important religious symbol of the ancient Cretan religion usually associated with goddesses, with Crete being the purported location of the Minoan Labyrinth