You know, because damage lasts "until end of turn." Because this is a kindler, gentler FAQ(TIWDAWCC), I'll answer your question instead of mocking you
For three mana, Fraying Sanity is a Blue Curse that reads, At the beginning of each end step, enchanted player mills X cards, where X is the number of cards put into their graveyard from anywhere this turn. As above, thats great if youre in mill, but kind of rubbish otherwise
If Warehouse Tabby leaves the battlefield while it has an Aura you control attached to it or at the same time as another creature with an Aura you control attached to it, its ability won't trigger for those enchantments unless they were destroyed by the same effect that caused Warehouse Tabby to leave the battlefield
If you want to make a Vampire deck, you definitely could, but you could also draft a black-red deck and have zero cards in your deck that referenced Vampires
Let's start off with my favourite colour, Black, and here's a sample of what an Unglued card at the time is
Give Cromat flying
