Well, thats mainly down to the rider of needing seven or more Plains in play for it to trigger (and maybe a little because some white decks cant tutor it, so folks tend to undervalue having access to it)
Then we have a Peni who draws cards with modified creatures, a Noir Spider-Man who buffs creatures when they attack in solitude, and a Peter Porker who buffs up every kind of animal
ARMORED ASCENSION While most of the better effects to buff a creature are on the cheap end, for usually one or two mana, they all rely on the number of enchantments in play
Sibsig Muckdraggers Gravedigger effects are always playable in Limited, and Sibsig Muckdraggers delivers
At the top end we have Crested Sunmare and Felidar Sovereign doing their best to be Archanagles two and three
If they lost life this turn, they reveal their hand, you choose a nonland card from it, and they discard that card