Mono-colored commanders greatly restrict the tools available to you, so they need to supply lots of power to make up for it, and Dragonhawk doesn't get there for me
Number Four Both then and now, Gemstone Caverns is one of the most expensive cards in the set - even when factoring in the timeshifted cards as well
In a deck with a bunch of artifact creatures and/or vehicles its a 7-mana 10/10 flying, vigilance, trample, lifelink, haste
First Edition Lorcana Cards One aspect of collecting TCG is obtaining First Edition Cards
Skullclamp (artifact, 1 mana): Equipment that turns dying 1-toughness creatures into two-card draws
Escape was a well-received mechanic, and spawned several tournament-caliber cards (at least one of which developed a deck based completely around it)