Cheapest priced copy (Innistrad: Double Feature): $0.35 at Card Kingdom, near mint, their price list as of .
Cloaked Cadet 
Creature — Human Ranger · 2/4 · Uncommon · Innistrad: Crimson Vow · #192
Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.)
Whenever one or more +1/+1 counters are put on one or more Humans you control, draw a card. This ability triggers only once each turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Innistrad: Double Feature | 459 | Uncommon | $0.35 | $0.49 |
| Innistrad: Crimson Vow | 192 | Uncommon | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 19 November 2021A creature's training ability triggers only when both that creature and a creature with greater power are declared as attackers. Increasing a creature's power after attackers are declared won't cause a training ability to trigger.
- 19 November 2021You draw only one card no matter how many counters are placed or how many Humans they are placed on.
- 19 November 2021Once a creature's training ability has triggered, destroying the other attacking creature or reducing its power won't stop the creature with training from getting a +1/+1 counter.