Nissa comes with the flexibility of a variable mana cost, but what makes her truly fearsome is her +1 ability
You might give up your entire life total in one turn, or you could pay 3 or 4 life each turn you control it
Esper Sentinel is a powerhouse both in cEDH and Modern, and it's very likely the best card-draw effect in white
Like those, it was banned to avoid the perceived-barrier-to-entry, but was strong enough to be a candidate for banning even without the optics especially in long games where the card draw yields inevitability over time
Scions & Spellcraft Final Fantasy XIV Finally, we have Yshtola leading a spell-slinging control deck
Why, Urborg, Tomb of YawgmothUrborg, Tomb of Yawgmoth of course