Cheapest priced copy (Commander 2018): $5.49 at Card Kingdom, near mint, their price list as of .
Ravenous Slime 
Creature — Ooze · 1/1 · Rare · Commander 2018 · #34
This creature can't be blocked by creatures with power 2 or less.
If a creature an opponent controls would die, instead exile it and put a number of +1/+1 counters equal to that creature's power on this creature.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $5.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2018 | 34 | Rare | $5.49 | — |
| The List | C18-34 | Rare | — | — |
6 rulings from Wizards of the Coast
- 13 July 2018If more than one replacement effect tries to change where a dying creature ends up, that creature's controller chooses which effect applies. For example, if two players control a Ravenous Slime, a creature controlled by a third player will be exiled by the Ravenous Slime of that third player's choice, and the other Ravenous Slime won't get +1/+1 counters.
- 13 July 2018The exiled creature's last known existence on the battlefield is checked to determine its power.
- 13 July 2018A token creature can die just like a nontoken creature before ceasing to exist. Ravenous Slime can replace this by exiling the token.
- 13 July 2018If an opponent's commander would die, that player may choose to put it into the command zone from exile after Ravenous Slime's replacement effect has been applied and it has received the +1/+1 counters.
- 13 July 2018Once a creature with power 3 or greater has blocked this creature, changing the power of the blocking creature won't cause this creature to become unblocked.
- 13 July 2018If Ravenous Slime dies at the same time as an opponent's creatures, the opponent's creatures are exiled.