Imperial Aerosaur

Flying
When this creature enters, another target creature you control gets +1/+1 and gains flying until end of turn.

Ixalli's Keeper

{7}{G}, {T}, Sacrifice this creature: Target creature gets +5/+5 and gains trample until end of turn.

Hardy Veteran

During your turn, this creature gets +0/+2.

Ixalli's Diviner

When this creature enters, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

Steadfast Armasaur

Vigilance
{1}{W}, {T}: This creature deals damage equal to its toughness to target creature blocking or blocked by it.

Atzocan Archer

Reach
When this creature enters, you may have it fight another target creature. (Each deals damage equal to its power to the other.)

Knight of the Stampede

Dinosaur spells you cast cost {2} less to cast.

Karametra's Acolyte

{T}: Add an amount of {G} equal to your devotion to green. (Each {G} in the mana costs of permanents you control counts toward your devotion to green.)

Polukranos, World Eater

{X}{X}{G}: Monstrosity X. (If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.)
When Polukranos becomes monstrous, it deals X damage divided as you choose among any number of target creatures your opponents control. Each of those creatures deals damage equal to its power to Polukranos.