Playable cards

Good day all. I used to play MTG back in the 90's. Things were quite simpler then. I recently came into a box of cards and there are a bunch of "new" types. I'm wondering if these are usable or what. Any help is greatly appreciated. Here are some examples.

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AlasBabylon_

Anything with a silver border or (nowadays) an acorn shaped holofoil stamp (which so far has only shown up in one set - Unfinity) are all "joke" cards and are not meant to be put in serious decks.

The others are legal to use, as the other commenter has described, and they've done a solid job explaining their rules. There is one card there though with the Fuse mechanic - normally you cast either one half of it, or the second half, ignoring all elements of the other half when you do so, but Fuse lets you cast both in sequence if you combine their mana costs.

keepitsimple_tricks

White border? Unlimited to 9th ed and Chronicles had white borders.

I think you mean silver bordered

AlasBabylon_

Woops. Got tripped up by the comment and it stuck in my head.