Enter any creator of X/1 creatures, from Sokenzan, Crucible of Defiance to Bitterblossom, and the -1 killing the creature as soon as you equip it turns Skullclamp into one of the best draw engines in the game
This tin gives you the chance to command the psychic might of Team Rockets Mewtwo ex, making it an essential pick for fans of strategy and power alike
However a few do have "practical" uses - here are some examples: The particular card you reference, Garruk the Slayer, was created for the Magic 2015 prerelease and is used in a variant where one player plays normally and the other plays as Garruk
Merfolk have just 9402 decks over at EDHREC.com, which is a top 20 archetype at 17, but pretty low considering how often they were played in the old days
These sets include a bizarre retro 80s high school photo drop set, a set with stickers, a set inspired by 1950s cartoons, and more
Enter the Unknown Enter the Unknown is quite comparable to the fan-favorite Explore, and there are many instances in which a +1/+1 counter/surveil 1 is worth as much as the draw and definitely deserves more consideration