The Girl in the Fireplace and Time Beetle marry Time Travel to combat damage triggers, The Wedding of River Song lets you Time Travel , and Wibbly-wobbly, Timey-wimey puts Time Travel on a cantrip
You'll mostly see it in control decks that need something like this in order to remove all the cheap aggressive creatures
As a Dragon, theres also plenty of synergistic cards out there to make Korvold hit harder, be more difficult to remove, or even cheat into play to bypass that pricey mana cost
So, one of the most popular types of Pokmon is the water type
For example, I had a card that I knew was my first trade as a kid and wanted to encapsulate the card to pass down to my kids eventually (I didnt care about the monetary value)
What this tool allows you to do is attach it to a Future pokemon and eliminate its retreat cost