If you didn't know who Tom Bombadil was, you'd be excused for thinking the name was Tombo M
As someone whos played with Lost in the Maze using a commander who pairs well with it, sudden, out-of-nowhere hexproof like this can really cause a turnabout if youve got creatures you really need to stick around
Also, an honorable mention goes to Abeyance, which doesn't look like much today, but its original wording basically made it a mono-blue Time Walk back in 1997
Prowess triggers alone wont get the job done, so you'll need combat tricks
Doing all the work of getting songs into your discard to make him cheap enough to play only to have him immediately and efficiently dealt with is pretty backbreaking
And given the 20 or so frogs with enters abilities, Clement included, you at least have a readymade suite of frogs to run