If you take control of an opponent's Lich's Duel Mastery and fail to put a shield into your hand because of this, you'll sacrifice Lich's Duel Mastery
The first two, Planechase and Archenemy , were Wizards' own creations, eventually drawing on casual formats from the game's own community (Chaos Magic, for example, was clearly an inspiration for Planechase)
Even tutor effects can be used to cheat essential creatures into play, such as Avacyn, Angel of Hope
Theyre a big part of whites visual identity, and its draft format as the easily-expendable go-wide creature, which means Cartagena needed to put a lot of work into making them work
Basalt Monolith Basalt Monolith is a fiddly untapping artifact that can give you a burst of mana, though its more commonly used for evil
Either way, a 2/2 for three that can bounce any dork when it comes into play is great although not quite great enough for two copies with the three slot being a very contested slot for blue guys