Innkeeper's Talent

Enchantment — Class{1}{G}

(Gain the next level as a sorcery to add its ability.) At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. {G}: Level 2 Permanents you control with counters on them have ward {1}. {3}{G}: Level 3 If you would put one or more counters on a permanent or player, put twice that many of each of those kinds of counters on that permanent or player instead.

Colour identity Green

In short

Innkeeper's Talent has 4 listed printings; the most valuable is the Secret Lair printing from SLP at US$23.96 on TCGplayer's market price. Prices below are the cheapest in-stock listing in the United States.