Protean Thaumaturge | Ondu Spiritdancer

Cards

Cast any enchantment by paying its mana cost.
When the enchantment enters the bttlefield,
Protean Thaumaturge and
Ondu Spiritdancer triggers.
Resolve the
Protean Thaumaturge trigger, causing it to become a copy of
Ondu Spiritdancer while keeping its ability.
Resolve the
Ondu Spiritdancer trigger, creating a token copy of the enchantment that was cast.
When the enchantment enters the battlefield,
Protean Thaumaturge triggers twice.
Resolve the first trigger, causing it to become a copy of
Ondu Spiritdancer while keeping its ability.
Resolve the second trigger, creating a token copy of the enchantment that was cast.
Repeat from step 5.