The most likely reasons are if its sacrificed, if its legendary and another legendary land with the same name is controlled by the same player, or if its also a creature and its toughness is 0 or less
Then you put one of those cards on the battlefield with a finality counter
Between these two decks, and the accessories I've touched on above, Shimmering Skies is really a fun, celebratory entry in this game that hasn't yet missed its mark at all
Because it lives in both fresh and saltwater, its best to stay clear of water in general if you want to avoid Gyarados
8 Whimsicott (Genetic Apex) A Lousy Space Filler, With Low HP And Low Attack HP: 80 Retreat Cost: 1 Type: Stage 1 - Grass Whimsicott is one of the weakest Stage 1 cards in the whole meta
I got three 4-1s in a row with it out of the gate, so decided to take it through some higher level events