Several Mages have reusable markers that they can place on creatures. Beastmaster's Pet, Warlock's Bloodreaper, Priest's Holy Avenger, and Necromancer's Eternal Servant all say that they can be placed on a new creature if the current one is destroyed.
How does that interact with Obliterate?
Obliterate
When you obliterate an object, it is utterly destroyed, leaving no
trace. The object is destroyed, then it is removed from the game.
It does not become discarded or get returned to a spellbook. Any
ability or effect printed on that object, or attached
to it (such as a marker or enchantment), which triggers on destruction, is
canceled.
Other destruction effects, not attached to or part of the Obliterated
object, can still occur.
Do the markers get returned to the mage, or are they removed from the game?