pokemon first edition all cards Pokémon 1st/2nd Generation from 1999! Pack of 50 Guaranteed Holographics and editions!! No more then 6 energy cards in each lot unless requesting more! Product ID: 792759981470 : Toys & Games and many more! The first Pokemon card ever

Is this from a starter deck or something

It also acts as a timed tax piece, and it covers not only the creatures exiled, but spells with flashback or unearth, spells from the command zone, casting from the top of the deck with cards like Pantlaza or Ureni

Discard two cards, draw four cards

Having to only spend one mana to have a card that puts you two mana ahead for the rest of the game until removed is absurd

If the permanent that returns to the battlefield has any abilities that trigger at the beginning of the end step, those abilities won't trigger that turn

For more information on where to find them, see Mark Rosewater's article on Booster Fun