all shadow pokemon cards Rider Calyrex - Vmax & V - Chilling Reign - Ultra Rare Card Lot Attack 1 Gengar HP 130 Night Gate

By understanding what it is that makes an ultimate ability good or bad you should be in a better position to evaluate opposing planeswalkers threat level in a more useful contextual way

If you don't have a copy of the card in question, the next best thing is a card from the same set with similar attributes, like color, rarity, or foiling

Adolf Hitler Propaganda Postcard Original Adolf Hitler propaganda period postcard published by Hoffmann from Mnchen in white and black measuring 15 x 10.5cm, inscribed Reichskanzler Adolf Hitler (Chancellor Adolf Hitler)

In any other format, you should have won by the time you have enough mana to cast this, even in mono blue

This is largely due to special Magic cards here and there, but a lot of it has been more substantial