Floodtide Serpent

[IntoFire]

When {Floodtide Serpent} ETB's , do I return the enchantment when he enters or any time he wants to attack?

[FustyDavorite]

It states on the card (this cost is paid as attackers are declared.) so if you want to attack with him, you pay the cost.

[IntoFire]

So if I want to bounce back my {Boon Satyr}, I have to attack with the serpent?

[Pleeb]

If you want the serpent to bounce the satyre, then yes.

[ibtrickey]

It has to attack yes