During the Virtual World arc, Kaiba chose this mighty ruler to be one of his deck masters, and its easy to see why with his command over colossal lizards and being able to protect them, this is one lord that any dragon duelist would greatly benefit from having in their deck
These things make it totally fine to play in a deck with no ways to abuse where it is still powerful and versatile
Playing this card early on is a fantastic way to quickly climb up the inkwell ladder to dominate your opponent
Other cards that make this scarier: Fathom Feeder (a staff favorite), Titan's Presence (premium removal), Ulamog's Nullifier (so you get value out of non-land cards too), Transgress the Mind, Horribly Awry (which can chain nicely into some of your later cards while keeping the board clear, Blight Herder ( which can really help hit that 6th or 10th mana) and, of course, Ulamog, the Ceaseless Hunger
Lore: Once per turn: you can discard 1 card
The grammar change ("you" to "your opponent" and "your" to "your opponent's") definitely helps, and the cost helps keep this card in check (although, honestly, discarding a card is a fair enough cost - I don't support the whole match-type part of this, seeing as this is already a situational card)