Mono-green is the only color technically capable of gaining life that doesnt have a suitable life gain commander or a high number of decks
Being able to pick and choose whether you draw a card normally or greedily play it off the top in a long game means you basically have a modular Dark Confidant, and you can keep lands in your hand to pitch to something else and play lands off the top for free once a turn
The card is slightly situational, but when you get to counter a Thoughtseize or a Counterspell for a single mana, you will usually end up being very ahead in the game
The thing is, ward is a trigger, so if your other legendary creatures, like Sauron, the Dark Lord or Miirym, Sentinel Wyrm, your opponent would have to pay that ward price twice
I think more than anything, its the ability to negate any varieties of Heroic Intervention that get thrown out in response
Incredible Super Strong L 127 Mr