Gruul is also pretty great at granting Overrun effects, which play well with creatures that have menace
Target creature gets +X/+0 until end of turn
His old-school influenced fantastical style helped shape the direction of Magic art, and while he no longer is a regular artist for the game, he still pops up here and there to give breathtaking, mythic feeling art every now and then, usually on cards that reference his older works
If you go the Voltron route with Yenna, you get extra copies of cards like Ethereal Armor to make Yenna massive, and then use a Spirit Mantle or two to start knocking players out of the game
Fortunately, you don't need to understand the Laws of Time to understand paradox abilities, you just need to cast spells from unusual places