shock mtg card of the Day: Sudden players cant cast spells or activate abilities that arent mana abilities.) _# Sudden Shock deals 2 damage to target creature or player. MTG Card Price Shock: Awesome

But I know that it could be a powerful cure for a major ill at Commander tables in a lot of places

The playability of this card will depend on how the meta shapes up and includes characters like them, as you will usually simply want a 001-197 over it, but if Ward is a problem, this Decree will be the answer

But if it brings back a massive threat like Griselbrand on turn two or three, that tradeoff can be game-changing (and yes, Griselbrand also lets you pay life for cards)

Promo Cards Big reveal days mean new promo cards to hunt down

and The Legend of Rokku provides two turns of impulse draw before turning into a game-ending threat

They are burst ramp and not sustain ramp and so they go a lot better with some types of cards than others