While not a failure in design, Liliana of the Dark Realms was a different kind of mistake
Is a vanilla 5/6 enough by then
Cycling 2 (2, Discard this card: Draw a card.) In Legacy, you can do it multiple times and with one card using Jandor's Saddlebags (2 Artifact 3, Tap: Untap target creature.) In Modern, you can use Magewright's Stone (2 Artifact 1, Tap: Untap target creature that has an activated ability with Tap in its cost.) Vraska, Relic Seeker: High cost planeswalkers (actually, most planeswalkers) don't make it in Modern
Combined with reprinted cards, you can create completely new strategies and gameplay possibilities
Irencrag Pyromancer, then, is a rare but welcome example of an empowered fat person in Magic
He's a two-mana 1/3 Human Warrior creature with deathtouch that enhances every one of your creatures with deathtouch (including himself) with the added ability to bestow two poison counters to players unlucky enough to be dealt combat damage