Human is a more relevant creature type than Vampire, but theres more going on here in terms of generic power
Since Esper Sentinel has a base power of 1 and the current power is 3, Sovereign Okinec Ahau attacks and places two +1/+1 counters on Esper Sentinel
Overall Playing through the start of Pocket, you get so many of the different currencies, that it's really easy to spend quite some time blasting through it
Then when it deals damage you get to tick up your Ring emblem and THEN discard your hopefully empty hand and draw 4 which is just incredibly powerful
There is also less room in construction for things that cost six regardless of any mana returns they might offer
Swooping Pteranodon Swooping Pteranodon is kind of a chore to read, with it calling out flying Dinosaurs and making lands damage creatures, but its easy enough to understand once youve done your homework