This isn't meant to OTK since it's a permanent
We could see
play dragon, this, pa
attack for 10 (10)
proc, deal 10, attack for 20 (40)
proc, deal 20, attack for 40 (100)
& if they had some mitigation to not be dead (granted, a second dragon at some point should've sealed it) then: proc, deal 40, attack for 80 (220)
So this card is meant to get out with 20+ cards left in deck & win in next couple turns. I could see it mostly working in a 40 card equalize dragon stallbow. Go with georesonator quanta engine over nova. Potential to rely on damage with Tesseract, tidal/arctic dragon combo possible. Space Whale would do well too, should thaw for last couple hits
Ruby damage: 15, 60, 150
Don't think the meta needs more clocks