Not only is he Luffys grandfather, but hes also a retired instructor who teaches Coby and Helmeppo how to fight and use Haki
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
A blood-soaked, vampire-themed powerhouse that leverages Edgars ability to turn every spell into a threat
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
You may want to try ingratiating yourself to the table by offering to remove troublesome cards that players hate even more, especially any stax pieces
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.