Four-mana Wraths have been hard to come by in Standard in recent years
The aim is to have lots of creatures that benefit from your casting non-creature spells, and then cast lots of spells, attack and win the game
Lands often have no use late game in limited, so sacrificing a couple to give yourself a few extra cards never hurt, especially when the additional costs involved "tap" and not "spend mana"
The runner-up is Colossus Hammer with a straight 8-mana equip cost
...which is what Right, I didn't mention it in the main review since I didn't talk about any of them, but We are into Green again, with alternate art for Drudge Spell does, which 'consumes' two dead creatures in your graveyard to create 1/1 Skeleton tokens (with Regenerate, which is the signature keyword for old skeletons)