Similarly, if a spell is cast without paying its mana cost, but the player did pay mana for additional costs such as from kicker or from Thorn of Amethyst, Boromir's second ability won't trigger and won't counter that spell.
Not only is he Luffys grandfather, but hes also a retired instructor who teaches Coby and Helmeppo how to fight and use Haki
Of course, Bahamut has made appearances across most mainline games, sometimes playing a greater role in the story, other times just being a super cool dragon to help you out in battle
There's also Helm of the Host for a more permanent alternative, Sword of Feast and Famine to untap all your lands twice for peak combat trickery, and Sword of Wealth and Power for lots of spell copying and Treasure tokens
Its a good enabler and one day maybe it will come back, but at the moment, other options are better