When checking a deck with foils, its important to view a cards acceptability holistically
UR Ultra Rare Magical Hats X TRAP During your opponent's Battle Phase: Choose 2 Spells/Traps from your Deck and 1 monster in your Main Monster Zone
Their card back is entirely different to the one found on standard Pokemon cards which are standardised to allow any card to be used when deck building (take a look at our Pokemon card back design guide for more details)
Elspeth can come down in the mid-game since she costs five mana, either establishing a board presence with her first two abilities or destroying a problematic creature of your opponents, making her a control players dream planeswalker
Once per turn, you can target a monster your opponent controls and equip it to this card practically turning your opponents monster into an equip spell
You'll see a collector number followed by a single letter: C, U, R, or M