If any card is popular in Legacy, then this is the only way to get them - barring of course a reprint in treasure chests, which again may have possible IP issues long-term
Mise As a potentially very powerful card draw, Mise looks like a lot of situational fun
Unlike its predecessor, you dont get to hold on to the creature you steal unless you can pay energy equal to that creatures mana value
Being able to tap Mox Amber for blue mana without using Emry, Lurker of the Loch creates some absolutely absurd sequences
If you have at least four Humans (including Rick itself) all of them get a stat boost of +2/+2 which when you have a giant battlefield of Humans gets out of control very quickly
Even though the activated ability costs more, you can play this and draw the first card before Greed comes down and does nothing, and it's easy to sneak 2 mana here and there as you hold up interaction on stuff