If the payment is followed by the phrase "When you do," then you'll choose any targets for that reflexive triggered ability and put it on the stack before players can take actions
Before we go any further, however, a quick decklist: Creatures (34) 4 Lovestruck Beast 4 Questing Beast 4 Yorvo, Lord of Garenbrig 4 Syr Faren, the Hengehammer 2 Nylea, Keen-Eyed 3 Kogla, the Titan Ape 2 Ashaya, Soul of the Wild 4 Tangled Florahedron 3 Old-Growth Troll 4 Kolvori, God of Kinship Lands (21) Spells (5) As proof of concept, heres a Mono-Green Legends deck that exactly meets the suggested nineteen legendary creatures
When the package arrived, me and my son opened it up with excitement, but I was a little disappointed that there was no tutorial which I had expected, having heard from someone that the Sun & Moon starter contains a tutorial describing things step-by-step with two small premade decks (I guess this is only for the English version)
The inner parts can be taken out and it allows for a modular system of sorting when dealing with large amounts of unsorted cards