When using a Power, can you ignore parts of its effect that you don't want to use (e.g., not adding Blight), or use a weaker version of them (e.g., Pushing only 1 Town with a "Push 2 Towns" instruction)?

When using a Power, can you ignore parts of its effect that you don't want to use (e.g., not adding Blight), or use a weaker version of them (e.g., Pushing only 1 Town with a "Push 2 Towns" instruction)?

• Spirits can target a land where some effects or possibly all of them won't do anything. (e.g., a Power with a "Push 1 Town." instruction doesn't need to target a land with Towns.)
• If an effect is explicitly optional, it can be ignored. (e.g., "You may instead Remove 1 Blight." doesn't need to remove Blight even if there is Blight in target land.)
• If given a choice for how many pieces to affect (e.g., "up to 3"), 0 pieces is a valid number unless a minimum amount is specified. (e.g., "Push up to 2 Dahan." can Push 0 or 1 Dahan even if 2 Dahan are present.)
• If an effect checks how many Elements you have – usually as part of an Elemental Threshold requirement – you may choose to apply fewer Elements so long as you're consistent for the entire Power. (e.g., if you choose to use 8 Fire for a "1 Damage per Fire" effect, you also meet and must use an "If you have 7 Fire" threshold. But you could alternatively use only 6 of those Fire for the Power in order to deal 6 Damage and ignore the 7 Fire threshold.)
• If a threshold requirement includes an Energy cost, you may choose not to pay it in order to skip that threshold. (e.g., "If you have 3 Fire and pay 2 Energy" does not require you to pay 2 Energy even if you have 2 Energy to spend and are using 3 Fire for the rest of the Power.)