While they are both solid role-players in the right build, one thing stands out about these two Titans: they arrived to very little fanfare
The Tyrant was out of place in Gatecrash , a decidedly non-artifact focused set, and so it flew under the radar for a while before folks realized oh, wait, its incredibly easy to get 20 artifacts under your control in any Eternal format. With two previous encore performances in Commander 2016 and Commander 2019 , Hellkite Tyrants low print run has meant its kept a price tag that fluctuates for years
There are a lot of directions you can take, too, from tap/untap shenanigans to stax manipulation with cards like Winter Orb
Can you afford a card which relies on an outside enabler like a sac outlet or self-damage
If I had done this with my first deck built around Stone-Tongue Basilisk, I would build to take advantage of its Threshold ability, an ability that only kicks in when I had 7 cards in my graveyard