For example, The Queen Wicked and Vain has the ability: I SUMMON THEE Draw a card. To use this ability, you must exert her then you can draw one card from your deck
Prevented attacks until Mikaeus, the Lunarch activations spoiled his triggered ability, at which point he could still block one a turn but couldn't kill anything anymore
A stax card like Endurance can greatly lessen the strength of this deck
Some decks will occasionally feel fine skipping their combat step, but nobody wants to skip drawing a card or getting to cast spells
The only difference is a Planeswalker symbol in the lower left corner, like what you find on cards from The List in Set Boosters
They may not alter the actual gameplay, but they sure do look nice