These rules are now forbidden in all official Magic: The Gathering tournaments, though there is nothing stopping people from using them in unofficial games
Time will tell if Lorcana 's Archazia's Island set will add more of these cards and whether Ink Geyser and similar effects will indeed see play in non-casual games, but considering how controversial mass land destruction is in Magic: The Gathering even in casual matches, this could be a ticking time bomb
After all, once they're caught, no sense in putting out another bounty on them, right
Moggcatcher is a Human Mercenary, but for three mana it allows you to search your library for any Goblin and put it directly into play
There are extra incentives beyond this for repeat pre-release goers, like a velvet dice bag for second-time pre-releasers, but the d10 is a huge question mark right now
If it's a land card or a creature card with converted mana cost less than or equal to the number of loyalty counters on Nissa, Steward of Elements, you may put that card onto the battlefield