Grotle 164/162 Loading
Well, duh, that's obvious, of course it would be worth this cost
It took a couple of MTG sets to be used effectively, and 20 years later lots of sets regularly use this feature like Throne of Eldraine , Streets of New Capenna , Shadowmoor , Modern Horizons 3 , as well as many Ravnica sets that came after
"Self-Destruct" is a famous ability in FINAL FANTASY, seen across many enemies (like the Bomb) and Blue Mages in many games can master this ability as well
The recent addition of the cycle of cast for free without a commander spells out of Commander 2020, such as Fierce Guardianship and Deflecting Swat are a good addition to the meta in my opinion because they allow you to protect your commander to a certain degree once it's in play, though the black one - Deadly Rollick is a creature removal spell, and the green and white spells are particularly lame - white's Flawless Manuever really seems like it ought to give your commander hexproof until the end of the turn (then it would protect from deadly rollick) and green's Obscuring Haze is even more underpowered