In this case, the app shows the aftermath of Mewtwo's escape, with a trail of destruction and broken glass left behind him
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Sending any other Sky Striker Spell to the graveyard is also useful to build up the Spell count in the graveyard, enabling Sky Striker Mobilize Engage
Teneb, the Harvester ( F, R ) - Not necessarily a good pick for Scion of the Ur-Dragon due to the legend rule, but this does allow reanimating a dragon from the graveyard once per turn (or twice, with double strike)
You'll likely need to adjust some names manually
the cards can look exotic or artistically interesting with Japanese script