mtg flashback cards Legal in Standard, Rules Text: Flashback, 42 Each instant and sorcery card in your graveyard gains flashback until end of turn Secrets of Strixhaven Variants Foil:
Description
Are Split Cards Multicolor
It's creatures-only, which is a lot worse than Teferi's Protection, but I think that's a Mount-Everest-level hill to climb and it's still a great choice

This card might take the prize for having the most on-the-nose name, but its a very powerful effect and one that only gets better as more artifacts get released

Here are some tips and guidelines: [8] Interactive cards are always safe to include

You can either remove more powerful attackers, or your opponents might just choose not to attack until they can deal with this card, buying you some time