Both these cards play around the lifegain theme, which is hugely popular in Commander already
Its worse in that its harder to deal three damage to your opponent with it, but even that can happen by targeting your own large, unblocked creature
Admonition Angel, Avenger of Zendikar, Emeria Angel, and Rampaging Baloths will provide continual upside, especially if you want to play Wheel of Sun and Moon and Zuran Orb to keep cycling all the lands through your deck while gaining bunches of life
It caps out at three cards (proliferate, anyone?), but it also leaves you up a Treasure, a 1/1 token, and a 4/4 vehicle after the bank heist is over
Its pretty much just a more expensive Night's Whisper or a worse Read the Bones
While very circumstantial, Opal Titans ability means that itll almost always have protection against at least one color