A few weeks ago I was at a Modern cash tournament and watched as a Jund deck, up multiple threats (including Kroxa) and cards against Bant Snow just lose to Uro, Titan of Nature's Wrath recursion because Jund couldn't dig for Scavenging Ooze
She gives you mana that makes your creatures enter with two counters, and if you have a creature with counters die, she lets you convert them to +1/+1 counters and put them on another creature
Among commons, Pactdoll Terror shines brightest in blue-black, counting as an artifact to fuel Haunt the Networks drain effect while adding additional drains when the Thopters enter the battlefield
Jonah Jamerson doesnt look like a hugely competitive card, so demand may be rather weak
A Shadowless Base Set Charizard is worth significantly more than an Unlimited one, even though neither has a 1st Edition stamp
More rare, full art cards featured in the Palkia expansion are listed below