These creatures can be cast for free with their evoke cost, just requiring you to exile a card that matches their color from your hand
While Rapunzel, Letting Down Her Hair and Tangle are both fairly underwhelming, Aladdin, Street Rat is a decent three-drop that drains for one lore, but more importantly, can be used to shift into Aladdin, Heroic Outlaw
Many legendary cards have higher costs to compensate for their stronger abilities, so Kethis giving you a flat one generic mana less cost for them helps get you in the game faster
Well, let's talk about Archenemy
The artwork for Twinflame Tyrant features the titular Dragon with both its heads out to hunt its prey, a lone soldier or explorer who was unfortunate enough to find themselves before this titanic beast
Grazilaxx, Illithid Scholar The best home I can think of for Grazilaxx, Illithid Scholar is a ninja deck, where you often want the option of bouncing your own creatures, and youre running a few value ETB creatures anyway