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Some tap abilities say I have to scrap cards from my hand or other additional costs. Can I use
a tap ability if I can’t pay that cost.


No. For example, if a tap ability says you have to scrap a card from your hand with an orange
battle icon, and you don’t have one, you can’t use that tap ability.
Source: Wizards of the Coast (2019-03-01)    【Link to Ruling】
Tags: Tap