Gaining or losing power is meaningless to it, however, effects that set its power to another number will still work
Ultimate Magic: Holy Many cards in Commander that protect your own permanents from certain doom are format staples, and Ultimate Magic: Holy costs just 1 more than Heroic Intervention
1 Tanglepool Bridge
*This product is the "Japanese version"
That means that while it's not particularly helpful (or threatening) on turn two, over the course of a game it could easily end up making you six, or even ten mana a turn, fueling your ascent to victory
Though were big fans of all of the sleeves weve listed already, sometimes you need sleeves to protect a much bigger volume of cards and, though you dont want to spend Dragon Shield money on protecting hundreds of them, you definitely dont want to skimp on the quality