Specifically, whenever an effect asks you to draw a card and your library is empty, you lose the next time a player would receive priority (which, in practice, pretty much means on the spot , regardless of what's in play or on the stack)
This is thanks to them actually being rather good, unlike Hidetsugu, Devouring Chaos
D-Tier: Enormously, Incredibly, Boringly Unfun and 95% Never Unbanned Erayo, Soratami Ascendant ($6) Gifts Ungiven (50) Griselbrand ($3) Leovold, Emissary of Trest ($2) Limited Resources ($3) Lutri, the Spellchaser (bulk) Nadu, Winged Wisdom (50) Panoptic Mirror ($8) Paradox Engine ($7) Primeval Titan ($8) Prophet of Kruphix ($1) Sundering Titan (bulk) Sway of the Stars ($3) Tinker ($1) Tolarian Academy ($200) Upheaval (bulk) A lot of these cards are just repetitive play patterns, over and over again
Answering Some Questions Since I've been talking about and researching counterfeit cards, a few themes have come up consistently among supporters of counterfeit cards
When Urza enters, create a 0/0 colorless Construct artifact creature token with "This token gets +1/+1 for each artifact you control."
What deck are you going to build next