rarest ex pokemon card in the world 25 Cards And What They're Worth, Ranked Mewtwo EX 54/99 Celebrations Holo

Otherwise, attacking a Siege works the same way that attacking a player or planeswalker works

As u/arlondiluthel points out, players should always refer to Oracle text when theres a discrepancy between printings. In theory, this should solve any issues before they get out of hand, however, as u/Nvenom8 notes, its not that simple

Even Blissey's pre-evolved form, Chansey, has seen love among Twilight Masquerade's best cards

The ball then closes up and tightens around the Pokmon, rendering it immobile.

It is much easier to appraise the value of a Pokemon card compared to appraising a baseball card for example

That is to say, it looks to all intents and purposes like a normal, non-full art Pokemon card, except the illustration features a Shiny Pokemon and pattern