When this creature enters, you may pay {1}{G}. If you do, search your library for a card named Llanowar Sentinel, put that card onto the battlefield, then shuffle.
Mana cost
2
G
Mana value
3
Printings
From
$0.19
EDHREC rank
#31758
Buy
Formats
Modern
Legal
Legacy
Legal
Vintage
Legal
Commander
Legal
Pauper
Legal
Rulings
4 Oct 2004
Because the "search" requires you to find a card with certain characteristics, you don't have to find the card if you don't want to.
15 Jul 2007
Llanowar Sentinels can "chain": If you put a second Llanowar Sentinel onto the battlefield as a result of this ability, that creature's "enters" ability triggers and allows you to search for yet another Llanowar Sentinel.