Eclipse Ritualist

When Eclipse Ritualist enters the battlefield, you
may mill 3 cards. If you milled two creatures,
create a 3/3 Human Shaman creature token with: whenever this creature deals combat damage to a player, you may exile a card from that player's graveyard and {2}{b}: transform this creature. Any player can activate this ability. It transforms into
a black token enchantment named Astral Eclipse
with: At the beginning of your upkeep, you may
return a card exiled by this token to a graveyard.
When you