The key card is present but its support is thin.
Prioritize useful support such as Rescue Leopard or Roamer's Routine.
Tap Botanist or Rescue Leopard to reduce a harmonize cost. Their tap triggers supply selection while the creature’s power pays only generic mana.
Your deck already enables the plan but is losing the early turns.
Take a castable early creature or efficient answer before a second expensive payoff.
The red Charring Bite Omen is usable without white mana, but its white Dragon side is not. Casting the Omen shuffles the card away rather than saving a later creature cast.
The support is missing
Favor independently useful creatures and interaction if the narrow support does not arrive.