Destroying minions with extra power
Use the current modified stats, not the base stats printed on the card.
In your particular case, it would require a &quot;Destroy a minions of power [3] or less&quot; card. From the FAQ,

Q: &quot;Destroy a minions of power [X] or less.&quot; Does [X] refer to a minion's base power (i.e. what's printed on the card) or the minion's current power?
A: Current (i.e. modified) stats.