No residue: our skins peel off without leaving any sticky residue or goo behind on your Credit or Debit card
Changeling creatures are both snails and rats, so if you cast a changeling, you can use the rat trigger to grow itself and sacrifice it later to draw cards
During your opponent's End Phase: You can pay 1000 LP, then target 1 "Sangen" Spell/Trap in your GY
There's also no doubt Irida makes Water-type cards stronger
I also like it in Type Four which often has elevated casting costs to bring back due to the infinite mana nature of the format, and bringing back a giant 10/10 and gaining 8 life in one card is pretty strong there
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