Still, this kind of library manipulation at this low of an opportunity cost is just too much, so I would not be surprised at all to eventually see it banned in Modern, as it already is in Pioneer and Standard
If you didn't know the backstory to Phelddagrif, you wouldn't understand the card name or why it's so weird, with the image of a Phelddagrif not helping
Specifically, theres a great synergy with Yshtola, Nights Blessed, which has caused Sigil of Sleep to spike over 700%
Sets like "Surging Sparks" are costing players almost $300 per booster box at local hobby shops, and that is just the tip of the iceberg, as sets from only a few years ago can sometimes approach $1000 per box
FORGET WHAT YOU THINK YOU KNOW It can be easy to understate the impact of a mechanic like this, which lessens the pressure of mana screw with little deck-building cost