Sentinel of the Nameless City

This land enters tapped. As it enters, choose a color. T: Add one mana of the chosen color. T: Add two mana of the chosen color. Spend this mana only to activate abilities of land sources.

Fathomless descent — All creatures get -X/-X until end of turn, where X is the number of permanent cards in your graveyard.

Ward 2 At the beginning of your first main phase, add GG.

You may have this land enter tapped as a copy of any land card in a graveyard, except it's a Cave in addition to its other types. T: Add C.

Whenever this creature attacks while you don't control another Dinosaur, put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Destroy target creature, enchantment, or planeswalker. Its controller creates two Map tokens. (They're artifacts with "1, T, Sacrifice this token: Target creature you control explores. Activate only as a sorcery.")

As long as this creature has three or more counters on it, it has flying and vigilance. Tap three untapped artifacts and/or creatures you control: Put a +1/+1 counter on this creature. Scry 1. Activate only as a sorcery.

Flying, first strike At the beginning of your upkeep, exile the top two cards of your library. You may play them this turn. If you exiled a land card this way, create a 3/1 red Dinosaur creature token. If you exiled a nonland card this way, create a Treasure token.