Thats because it acts like a mini-Reliquary Tower with the option to keep ten cards in your hand, plus you can draw the difference
Tier A - The Best of The Best ST13 - The Three Brothers This will come as no surprise to experienced players, but starter deck 13, The Three Brothers, stands at the top of the list
Emerald Collectors payoff to become a 4/4 for 3 mana seems underwhelming when you consider its conjuring one of the most powerful artifacts in the game, but I guess you dont have to use the Mox Emerald on this blue creature
Filled to the brim with cantrips, draw spells, burn spells, and everything else in between, Spellslinger decks reward you for casting as many spells as you can in a turn, generating some amount of value while doing so
(2/7/2025) Some spells and abilities which give you or say you "may pay" some amount of require one or more targets