This is often what makes people think that magic players at the time had no idea how good card advantage was
Rather, a second "reflexive" ability triggers when you discard a card this way
OpenCritic Reviews Top Critic Avg: 82 /100 Critics Rec: 82% Released September 27, 2018 ESRB T for Teen // Blood and Gore, Mild Fantasy Violence Developer(s) Wizards of the Coast, Wizards Digital Games Studios Publisher(s) Wizards of the Coast Engine Unity Multiplayer Online Multiplayer Franchise Magic: The Gathering Platform(s) PC, Android, iOS Genre(s) Digital Card Game
See, this wasn't something he came up with last second
Its almost anti- MTG , because you plop your creature down, nobody knows what it is except you, and then you get to flip it over dramatically, usually while shouting youve just activated my trap card! Its not just fun, its actually one of the better mechanics to build around in Commander, or just sprinkle into your normal decks
Whatever format you play in Magic, there were multiple cards released that you can play with and upgrade your decks with (or, in some cases, these cards wound up creating entirely new decks)