The key card is present but its support is thin.
Prioritize useful support such as Item Shopkeep or White Mage's Staff.
Develop an equipped attacker and Shopkeep, then use Vendor’s combat trigger to move a large Equipment for one mana before declaring attackers. Zidane can later steal the blocker that prevents a finishing attack.
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.
Re-equipping creates no new Hero. Expensive printed equip costs can leave you unable to redeploy after removal unless Vendor or another effect actually helps.
The support is missing
Favor independently useful creatures and interaction if the narrow support does not arrive.