In the case of Wall of Resurgence, youre likely going to need that mana early and getting your creature-land killed could be disastrous
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Weve done some of the initial legwork for you by scouring the entire list of 6,410 cards that are currently legal in the format and eliminating 87% of them so that you dont have to look at the draft chaff
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However, the whole having-to-wait-a-whole-turn-cycle-to-use-them is a real downside, just not one massive enough for me to knock one of the best Black cards of all time, both in and outside of cEDH
Rosa, Resolute White Mage Rarity: Rare TYPE: Legendary Creature SUBTYPE: Human Noble Cleric CMC: 4 Mana cost: USD: $4.00 EUR: 1.62 TIX: 0.76 EDHREC RANK: 6482 (2/3) Reach (This creature can block creatures with flying.) At the beginning of combat on your turn, put a +1/+1 counter on target creature you control