Flying, lifelink
When Aetherborn Marauder enters the battlefield, move any number of +1/+1 counters from other permanents you control onto Aetherborn Marauder.
If a creature has been dealt damage, that damage remains marked on it until the cleanup step. If Aetherborn Marauder takes counters from a creature that has been dealt damage, that creature will be destroyed if the damage is now lethal.
You choose which counters to move as Aetherborn Marauder's triggered ability resolves.
You may choose to move zero +1/+1 counters.
You may move +1/+1 counters from any number of other permanents you control, not just from one.