Eithné, Lady of Brokilon

Whenever a player casts a spell, you may
put a +1/+1 counter on Forgotten Ancient.
At the beginning of your upkeep, you may
move any number of +1/+1 counters from
Forgotten Ancient onto other creatures.
(Who are they? Those whom I know are
white skeletons lying ... deep in the forest ...
But Brokilon endures.)