Theyre our Magic fan fiction
This locations ability, Underwater Acoustics, gives any character positioned there an additional two points of cost to sing songs
Bident of Thassa, Coastal Piracy, and Reconnaissance Mission all reward you for every creature that connects with combat damage
If it does, it enters the battlefield with its front face up
Then you can really push this card with damage-based sweepers like Earthquake, or the really powerful one in Blasphemous Act which is a must play with this three-drop
For the most part, these sieges basically replace themselves when they enter the battlefield, either by putting a new card in the players hand or creating an extra permanent in play