Cheapest priced copy (Ravnica: Clue Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Kronch Wrangler 
Creature — Human Warrior · 2/1 · Common · War of the Spark · #166
Trample
Whenever a creature you control with power 4 or greater enters, put a +1/+1 counter on this creature.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ravnica: Clue Edition | 169 | Common | $0.35 | — |
| War of the Spark | 166 | Common | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 3 May 2019If Kronch Wrangler’s power is raised to 4 or greater as it enters the battlefield, it will cause its own ability to trigger.
- 3 May 2019If the entering creature’s power changes to 3 or less after it has entered the battlefield, you’ll still put a +1/+1 counter on Kronch Wrangler.
- 3 May 2019The entering creature must have power 4 or greater as it enters the battlefield, or Kronch Wrangler’s ability won’t trigger. Static abilities that raise (or lower) a creature’s power are taken into account. However, you can’t have a creature with power 3 or less enter the battlefield, raise its power with a spell, an activated ability, or a triggered ability, and have Kronch Wrangler’s ability trigger.