Cheapest priced copy (Conspiracy): $0.79 at Card Kingdom, near mint, their price list as of .
Grenzo, Dungeon Warden 
Legendary Creature — Goblin Rogue · 2/2 · Rare · Secret Lair Drop · #1569
Grenzo enters with X +1/+1 counters on it.
{2}: Put the bottom card of your library into your graveyard. If it's a creature card with power less than or equal to Grenzo's power, put it onto the battlefield.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
6 printings · $0.79 to $17.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Masters 25 | 205 | Rare | $0.99 | $3.99 |
| Conspiracy | 47 | Rare | $0.79 | $4.99 |
| The List | A25-205 | Rare | $0.79 | — |
| Secret Lair Drop | 1569 | Rare | $4.99 | — |
| Secret Lair Drop | 1569★ | Rare | — | $2.99 |
| Time Spiral Remastered | 378 | Special | $0.99 | $17.99 |
3 rulings from Wizards of the Coast
- 19 March 2021If a replacement effect (such as that of Leyline of the Void) causes the card to be put from your library directly into exile, you'll put it onto the battlefield from exile if it's a creature card with appropriate power.
- 19 March 2021Compare Grenzo's power when the ability resolves with the power of the creature card in your graveyard to determine if you put it onto the battlefield. If Grenzo isn't on the battlefield at this time, use its last known power from when it was on the battlefield.
- 19 March 2021If the card is a creature card with power less than or equal to Grenzo's power, it's put onto the battlefield from your graveyard, not from your library. Players can't attempt to exile it from your graveyard in response.