His [On Play] and [When Attacking] abilities are typically used on the opposing leader, designed to soften them up before your explosive attacks
Related The card Floral Spuzzems original printing included the phrase Floral Spuzzem may choose to as opposed to the expected you may
I made a Valkyrie Deck recently, so I was in the mood for some Fairy monster making, and here we got a pretty simple Tuner, which is able to bring itself out after a battle, and is able to Synchro Summon during the Battle Phase, it's completely generic, making it not only useful in Valkyrie, but pretty much in any Deck that can or wants to Synchro Summon, and makes it a great tool for getting in a new monster to attack with in the Battle Phase
Rooms actually trigger eerie twice once when the first door is unlocked on the initial enter of the Room, and again when you unlock the final door
Shuffle up to three target cards from your graveyard into your library