The biggest difference from the games is that competitively, switching happens all the time
Because they do not have Levels/Ranks, Link Monsters are unaffected by card effects that depend on a monster's Level/Rank (e.g.: "Gravity Bind"), and cannot become involved in actions that require monsters with Levels/Ranks (e.g.: Synchro Summoning) without specific card text denoting such an action (e.g.: the Synchro Yummy monsters)
Naturally, the Happy Meal cards will only be available while stocks last, and previous collaborations between the company
Long Rest Mistranslated Magic: The Gathering D&D Cards (See the Original Card before Google Translate) You might ask, why do I do this job
When you take battle damage, if you have no Spell/Trap Cards in your Graveyard and this card is in your hand: You can Special Summon this card, and if you do, it cannot be destroyed by battle or card effects this turn
Youre the instant archenemy of the table and the first to go if you play anything with infect, so keeping it at 10 counters at least gives you a chance to fight