"Stand still and try not to look like prey!"
—Skerk Hobnett, wilderness guide

Marauding Raptor

Creature spells you cast cost {1} less to cast.
Whenever another creature you control enters, Marauding Raptor deals 2 damage to it. If a Dinosaur is dealt damage this way, Marauding Raptor gets +2/+0 until end of turn.

The Lost Caverns of Ixalan Commander

Creature spells you cast cost {1} less to cast.
Whenever another creature enters the battlefield under your control, Marauding Raptor deals 2 damage to it. If a Dinosaur is dealt damage this way, Marauding Raptor gets +2/+0 until end of turn.

The List

Core Set 2020 Promos

Core Set 2020

Effects that reduce the generic mana cost of a spell (such as that of Marauding Raptor) can't reduce that spell's colored mana requirements.

Marauding Raptor's cost reduction doesn't affect itself.