Cheapest priced copy (The Lost Caverns of Ixalan): $0.35 at Card Kingdom, near mint, their price list as of .
Malamet Battle Glyph 
Sorcery · Uncommon · The Lost Caverns of Ixalan · #198
Choose target creature you control and target creature you don't control. If the creature you control entered this turn, put a +1/+1 counter on it. Then those creatures fight each other.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Lost Caverns of Ixalan | 198 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 10 November 2023If the target creature you control entered the battlefield this turn and is still a legal target as Malamet Battle Glyph resolves but the target creature you don't control isn't, you will still put a +1/+1 counter on the creature you control. The creatures will not fight each other.