Pact of the Serpent With Pact of the Serpent you may draw, or make another target player draw cards equal to the number of creatures they control of a chosen type
But, again, the two off color kickers drop its playability in Commander, so it's less likely to get played in that format, although if you are running the colors this is a very strong option there, very strong
Rite of the Dragoncaller $17.57 Whelp
The downside here, I guess, is that you might run out of cards, but its pretty likely that you kill your opponent thanks to your card advantage before running out of cards ever becomes a problem
The second ability intrigues and terrifies me all at the same time
When these battles come up, the Bant player has the clear advantage, as he or she is more likely to play the first Aetherling and likely to have more mana to devote each turn