When this creature enters, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.
When this creature dies, you may draw a card.
Solemn Simulacrum is one of the most universally playable cards in Commander, and its top-50 EDHREC rank reflects that. It does everything you want from a midrange value piece: it ramps you, fixes colors (slightly), blocks early aggression, and replaces itself when it dies. Pure card advantage and mana advantage in one body.
Because it's colorless, it slots into literally any deck. It's especially strong in:
- Sacrifice/aristocrats decks (Meren, Korvold) — the death trigger and a free body to sac.
- Blink/flicker decks (Roon, Brago) — re-trigger the land tutor repeatedly.
- Reanimator and artifact decks — recur it for value or use it as artifact fodder.
When to skip it: hyper-competitive cEDH lists usually cut it for being too slow — a 4-mana rock that only ramps one land is below curve when fast mana and two-card combos win the game. It's also weaker in mono-color decks that don't care about fixing and have faster ramp options like Sol Ring effects.
In short: a default include for casual-to-mid power tables, easily trimmed at the high end.