The term comes from Merfolk Looter, an early and popular example of that effect
Cardsphere is the most popular digital platform for Magic players to buy from private sellers
Aang, Master of Elements Behold the Unspeakable Boon of the Wish-Giver Brainsurge Breakthrough Control of the Court Cruel Bargain Dragonlord's Prerogative Galvanic Giant Galvanic Giant Goblin Lore Infernal Contract Into the Story Kozilek, Butcher of Truth Liliana's Contract Meditate Nibelheim Aflame Practical Research Prying Eyes Pyretic Charge Reed Richards, Smartest Man Sauron, the Dark Lord Sphinx of the Chimes Splatter Technique The Royal Scions Thoughtflare Tidings Tower of Fortunes Travel the Overworld Umaro, Raging Yeti Vindictive Flamestoker Your Puny Minds Cannot Fathom
Here are a few other rules to keep in mind during your first few games: Unless a creature has haste, all creature cards have summoning sickness the first round you play them, so they cannot attack until your next turn
If the creature you control is an illegal target as Joust tries to resolve, no creature gets +2/+1