Not only is Grixis Delver my favorite deck in Legacy, but I think there is a strong argument that in a post-Senseis Divining Top world that Grixis Delver is objectively the most powerful deck in the format
Instant Color tag templates(None) Swan Song Counter target enchantment, instant, or sorcery spell
I'm surprised we've not got the Gunblade from Final Fantasy 8, but the Buster Blade being reimagined as an Umezawa's Jitte is still excellent
When the dork arrives you can target it with a spell to exile the top card and cast it
And this set has a variety of ways to take advantage of both having creatures with plus-one plus-one counters on them and having a bunch of extra creatures around
Najeela, the Blade-Blosssom (Spider-Gwen, Web-Warrior) (MAR) $24 Najeela, the Blade-Blossom is such a ubiquitous commander that every set nowadays reprints it, be it Final Fantasy or Warhammer 40,000