Cheapest priced copy (Throne of Eldraine): $0.35 at Card Kingdom, near mint, their price list as of .
Garenbrig Paladin 
Creature — Giant Knight · 4/4 · Common · Throne of Eldraine · #157
Adamant — If at least three green mana was spent to cast this spell, this creature enters with a +1/+1 counter on it.
This creature can't be blocked by creatures with power 2 or less.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Throne of Eldraine | 157 | Common | $0.35 | $0.49 |
4 rulings from Wizards of the Coast
- 4 October 2019Once 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.
- 4 October 2019Adamant effects check what mana was actually spent to cast a spell. If an effect allows you to spend mana "as though it were mana" of any color or type, that allows you to spend mana you couldn't otherwise spend, but it doesn't change what mana you spent to cast the spell.
- 4 October 2019If an effect allows you to cast a spell without paying its mana cost, you can't choose to cast it and pay unless another rule or effect allows you to cast that spell for a cost. Similarly, you can't waive a cost reduction unless that effect says you may.
- 4 October 2019If you copy a spell that has an adamant ability, no mana was spent to cast the copy at all, so that ability won't apply.