Snapping Sailback

Flash
Enrage — Whenever Snapping Sailback is dealt damage, put a +1/+1 counter on it. (It must survive the damage to get the counter.)

Territorial Hammerskull

Whenever Territorial Hammerskull attacks, tap target creature an opponent controls.

Commune with Dinosaurs

Look at the top five cards of your library. You may reveal a Dinosaur or land card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Raptor Hatchling

Enrage — Whenever Raptor Hatchling is dealt damage, create a 3/3 green Dinosaur creature token with trample.

Plains

Ranging Raptors

Enrage — Whenever Ranging Raptors is dealt damage, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Mountain

Forerunner of the Empire

When Forerunner of the Empire enters, you may search your library for a Dinosaur card, reveal it, then shuffle and put that card on top.
Whenever a Dinosaur you control enters, you may have Forerunner of the Empire deal 1 damage to each creature.

Otepec Huntmaster

Dinosaur spells you cast cost {1} less to cast.
{T}: Target Dinosaur gains haste until end of turn.

Atzocan Seer

{T}: Add one mana of any color.
Sacrifice Atzocan Seer: Return target Dinosaur card from your graveyard to your hand.

Kinjalli's Caller

Dinosaur spells you cast cost {1} less to cast.

Bellowing Aegisaur

Enrage — Whenever Bellowing Aegisaur is dealt damage, put a +1/+1 counter on each other creature you control.

Siegehorn Ceratops

Enrage — Whenever Siegehorn Ceratops is dealt damage, put two +1/+1 counters on it. (It must survive the damage to get the counters.)

Cacophodon

Enrage — Whenever Cacophodon is dealt damage, untap target permanent.

Thundering Spineback

Other Dinosaurs you control get +1/+1.
{5}{G}: Create a 3/3 green Dinosaur creature token with trample. (It can deal excess combat damage to the player or planeswalker it's attacking.)

Forest

Rile

Rile deals 1 damage to target creature you control. That creature gains trample until end of turn.
Draw a card.