Am I just tired? Or does this guy not have anything that would let him tap cards for mana like this?

What's this guy using to cast like he has Convoke, or everything has "Tap for mana"

I know there's cards that can do it, but I don't see them here, and going over the text of the cards, I'm not seeing anything that would do so either.

But It's also 2am for me, so not going to dismiss I'm missing something.

https://preview.redd.it/09xxmzjfldue1.png?width=1920&format=png&auto=webp&s=190b2c7207bb933bf8d2c1dd7c883631e81fd8ed

https://preview.redd.it/ug4ojvbgldue1.png?width=1920&format=png&auto=webp&s=eba6fb84fd0891e6f93a6117401433cf5ed0321e

https://preview.redd.it/im6xo8bhldue1.png?width=1920&format=png&auto=webp&s=ba1e95b848591225e7473a9c8bc3ef53315df244