Counting the various treatments spread throughout those appearances, we're looking at eight distinct versions of the tree (and one serialized version)
For that matter, it doesn't matter who wins the duel, as long as it happens
Getting this effect each turn is strong, and opponents will have to spend something to deal with this bat cleric
Sure this card makes priestess come back, but it also is a XYZ engine letting you bring back monsters at particular levels
You can use this spell in a number of ways, like protecting your creatures from a board wipe, or by preventing an opponent from attacking you with their unstoppable army
Starting with the player second to attack, both parties will now use any Option cards/abilities that require to be used during the Battle Phase