In this case you become the new controller of the card, but it is still owned by the player who started with it in their deck (or the player who created it, in the case of a token)
Shadowheart, Dark Justiciar Shadowheart, Dark Justiciar is up next, and is a simple human elf cleric who lets you pay and a creature to draw cards equal to that creatures power
UR Ultra Rare Forbidden Forbidden Hot Red Dragon Archfiend King Calamity X DARK Level 12 [ DragonSynchroEffect ] ATK 4000 DEF 3500 2 Tuners + 1 non-Tuner DARK Dragon Synchro Monster When this card is Synchro Summoned: You can activate this effect
For example, check out the number of Rainbow Rares in each of these sets: Sword & Sheild : 8 total Sword & Sheild: Rebel Clash : 11 total Sword & Sheild: Darkness Ablaze : 7 total Champion's Path : 5 total Sword & Sheild: Vivid Voltage : 12 total Shining Fates : 1 total Sword & Sheild: Battle Styles : 12 total Twelve, I feel, is too many
You can only use this effect of "Good & Evil in the Burning Abyss" once per turn.