Can be Special Summoned when the opponent Special Summons a monster (excluding Damage Step)
These may change over time as well, since Konami routinely adds and removes cards from the games forbidden (banned) card list, but for now, these are some of the top performing decks in Master Duel
While they couldnt be used for Link Summons, they could be used for Synchro plays, which give players way too many materials to work with
And, Altergeist Hexstia, Altergeist Protocol, Number S0: Utopic Future et al all disrupt the opponent, allowing you to advance your game plan
The Rush Duel update to Duel Links is based on the Yu-Gi-Oh
Once per turn, during either player's turn: You can target 1 "Invoked" monster you control or in your Graveyard