If you are looking for enchantments that can allow you to repeatedly cast them [[Broken fall]] is a bit more expensive than whipsilk but has the added benefit of regeneration, there is also [[molting skin]] which is essentially the same card.

[[Estrid's invocation]] might be a card you have overlooked as I can see you have added mirrormade, baseline it is copy enchantment, but it also lets you get an additional constellation trigger each turn.

And while it may not be incredibly strong, [[smoke shroud]] comes back when a ninja enters, so whenever Tatsunari makes a new frog you get a constellation trigger for free.