Forerunner of the Empire
3R
Creature - Human Soldier
When Forerunner of the Empire enters the battlefield, you may search your library for a Dinosaur card, reveal it, then shuffle your library and put that card on top of it.
Whenever a Dinosaur enters the battlefield under your control, you may have Forerunner of the Empire deal 1 damage to each creature.
1/3
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Polyraptor
6GG
Creature - Dinosaur
Enrage - Whenever Polyraptor is dealt damage, create a token that's a copy of Polyraptor.
5/5
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Pirate's Pillage
3R
Sorcery
As an additional cost to cast Pirate's Pillage, discard a card.
Draw two cards and create two colorless Treasure artifact tokens with "T, Sacrifice this artifact: Add one mana of any color to your mana pool."
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Enter the Unknown
G
Sorcery
Target creature you control explores.
You may play an additional land this turn.
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Thunderherd Migration
1G
Sorcery
As an additional cost to cast Thunderherd Migration, reveal a Dinosaur card from your hand or pay 1.
Search your library for a basic land card, put it onto the battlefield tapped, then shuffle your library.
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Siegehorn Ceratops
GW
Creature - Dinosaur
Enrage - Whenever Siegehorn Ceratops is dealt, put two +1/+1 counters on it. (It must survive the damage to get the counters.)
2/2
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