[4] : 51 Creatures are divided into creature types, such as "goblin" or "wizard"
Almost entirely because of duplicate protection, they have now 100% lured me in as a customer to start seriously playing on MTG Arena and spending money, while also still collecting Common, Uncommon, Rare sets on MTGO (though no longer Mythics, it's too expensive to keep that up)
Several subreddits saw hundreds of comments where players were coming up with interesting combo potential and theorycrafting synergies, for everything from Hellkite Tyrant and Ichor Wellspring to Chandra, Spark Hunter
1/4 Illustrated by Campbell White Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
For example, if an effect allows you to cast a sorcery spell with mana value 2 or less from among cards in your graveyard, you could cast Assault this way, but not Battery
Mostly just don't bother trying to do that though is better advice