Left-Handed Magic Cards Secret Lair has seen a huge boost in price thanks to some surprising rogue decks in the Modern format
For example, Chatterfang, Squirrel General sacrifices Squirrel tokens to help you remove opponents' creatures
First, they boosted the power and toughness bonus it granted, then dropped the cost to only one mana to cast and equip, and finally made it so it gave the creature 1 toughness, and it ended up being that fateful 1 that made Skullclamp into a monster, since all you had to do was play one-toughness creatures and you suddenly had a repeatable, colorless, one-mana Divination
Yep, if you didn't already know, Bloomburrow has a squirrel precon
You play it, then you sacrifice the card, then your opponent "gets you target drink"
No, they must demonstrate that they know where it is