This is an incredibly powerful way to keep your opponents' threats and removal spells in check
While this allows the Crystal to appear in various strategies, it also means that the value you get from this card will be entirely dependent on who you play with
And as anyone whos played Vampire Nighthawk knows, you can always use another instance of deathtouch and lifelink on the board
And that's right, Paldean Fates will still be available for some time, which would usually make it less rare than other cards, but this card should become more valuable as time goes on anyway
That argument bears fruit (or treats, or kibble, etc.) when you look at the most valuable Dog cards versus the most valuable Cat cards
Cards like Sun Titan are ideal for this plan, as you can use them to accrue significant value over time through creatures like Eternal Witness, Loyal Retainers, and Wood Elves, fetchlands like Bloodstained Mire, or even previously destroyed mana rocks, so having a big creature or two that can fill this role is very helpful when possible