The main concepts you should be aware of are having enough lands in your deck and how much mana the cards in your deck cost
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
2) Fireblast Kunzar was later found in a crater of decimated earth
Curve Dragons tightly and include haste enablers so new tokens impact the board the turn they arrive
It can come out larger the further you are into a game, and benefits from other cards that can put counters on it