Amrou Kithkin can't be blocked by creatures with power 3 or greater.
Legalities
Not Legal
Alchemy
Brawl
Explorer
Future
Gladiator
Historic
Modern
Oldschool
Pioneer
Standard
Standardbrawl
Timeless
Legal
Commander
Duel
Legacy
Oathbreaker
Pauper
Paupercommander
Penny
Predh
Premodern
Vintage
Rulings
2009-10-01
A creature with power 3 or greater can’t be declared as a blocker for Amrou Kithkin. If the power of a creature that’s already blocking Amrou Kithkin is increased to 3 or greater, it will continue to block Amrou Kithkin.