Tokens that leave the battlefield will satisfy a revolt ability
If you are somehow generating one toughness tokens then it is incredibly efficient but even when your not it still offers great value and a variety of applications above and beyond pure card advantage
Similarly, in the Final Fantasy VII deck, there was a lot of contention on whether I could add Sephiroth or not, given the deck didnt have black in the color identity
(Plus Merlin, Shapeshifter in his own human form.) Each of the shapeshifting Merlin cards offers a different boon when they first arrive on the table and when they leave, presenting the opportunity to combine them with cards that cycle them in and out of your hand to stack up the benefits
This will be absolutely amazing in Lizard decks, but the +1/+1 ability is relevant for any deck that can get creatures in for combat damage
Soulcatcher's AerieSoulcatcher's Aerie