While everyone should be able to play and enjoy Magic , not everyone has to play tournament Magic , which is evidenced by the fact that a huge majority of the Magic community plays the game casually and couldn't care less about Grands Prix and Pro Tours
If youre based in Europe, this is your main hub
Number 217 Language English Legal Formats Commander, Legacy, Modern, Pauper, Pioneer, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Standard, Timeless Rulings (4/8/2016) The card types in Magic are artifact, battle, creature, enchantment, instant, kindred, land, planeswalker, and sorcery
If you really want to play it, Juzm Djinn is a rather unremarkable 4-cost 5/5 beater, though it is worth mentioning that it was the first 4-cost 5/5
If you cast a card "without paying its mana cost," you can't choose to cast it for any alternative costs