While I find Rivaz interesting, I wanted to explore the archetype deeper in Chainer
First, you could go find a five-color commander that might be decent with Lessons, even though it won't say the actual word on it
However, if you pay the Teamwork cost of 4 by tapping creatures with combined power of at least 4, you can do both
Unfortunately, the only decent giant in blue is Frost Titan
Demonic Counsel Demonic Counsel is Demonic Tutor if you have delirium enabled, or a good creature tutor in a demon deck, or a Kaalia of the Vast EDH deck
and there are tons of precon decks for new and experienced players to try out, with new decks typically releasing alongside most, but not all, MTG sets