You can pull off those counters for three cards, and if you managed to give it another counter, then you can keep it around (although I think it's better when you kill it)
Its not optimal, but if need be, Shura can also become an attacker with a quick Two Hundred Million Volts Amaru event card
Here's a snapshot from TCGplayer, capturing the three most valuable out the gate: As you can see, one can potentially open a $400+ card from a collector booster if they're lucky enough
They were even doing it before they were really showing it off
Much like Charizard, Sylveon's status as an Eeveelution makes any card it appears on more valuable than it would've been
You can also use Spectralsword and Samuraisaga to summon Shiranui Shogunsaga and Spectralsword andShogunsaga to summon Shiranui Sunsaga your strongest shiranui