This looks like a Timmy card through and through, and Timmy cards dont tend to put up tournament results
You can also exchange Crystals for additional coins in the shop, though Crystals are much harder to collect so you might want to avoid doing this
It can be difficult to know which card to counter, but I generally ask myself, Based on the information given, what card is the bridge to their end-game?, and counter that spell
If youre willing to wait until your fifth turn to have found the needed legendary creatures and are happy with a 75% chance of having Kolvori be a 6/6, then you only need a mere thirteen non-Kolvori legendary creatures, which is a much easier number to come to and still sounds acceptable to me
One example of this is the PSA 10 Base Set Holo Shadowless Charizard, which fetched over $400,000