Magic: The Gathering is the original collectible card game, meaning it was the first game to combine the traditional collectibility aspects of baseball cards (i.e., cards with varying rarity, bought in randomized packs) with the imaginative play of games like Dungeons & Dragons (i.e., you get to fight goblins)
For example, suppose you control a Mjlnir that isn't attached to anything as well as Loki, God of Mischief (a blue God Sorcerer Villain creature) with Super-Soldier Serum (an Aura with "Whenever enchanted creature attacks or blocks, attach any number of target Equipment you control to it.") attached to him
This means that Exploration tends to lose its effectiveness pretty quickly unless you have reliable ways to continue hitting land drops every turn
This allows you to repeatedly cast the same card over and over again, allowing for a deterministic win with Brain Freeze
If youre incredibly unlucky, though, dont worry
Remember, these are guidelines, not rules