If you are capable of healing your cards, through items, actions, or character abilities, and Beast, Tragic Hero has damage on them at the start of your turn, you can let them attack and then heal them, allowing you to still benefit from the increased strength but keeping them healthy enough to stick around
It's a powerful effect
Atlantica Concert Hall 33/204 Atlantica is an interesting location that could be helpful in reaching those high cost, Sing Together cards
Kaya's last ability checks to see whether the permanent was an Aura when it last existed on the battlefield, not whether it is an Aura card in exile
This is a powerful ability thanks to the fact that it allows you to set up which cards youre going to draw next - thereby putting the pieces you need in place to carry out the strategy you need to win the game
So it finds 0-mana cards, lands, and cards with no mana cost