Shell counter

Shell counter are a type of counter introduced in Weatherlight. They act as upkeep tracking for a creature becoming more powerful after several turns.
==Description==
Shell counters first appeared on <c>Roc Hatchling</c> in Weatherlight. It enters the battlefield with 4 shell counters on it with one being removed on each upkeep. After all shell counters are removed, the creature gains additional power/toughness and flying. This represents the creature breaking out of its shell to finish hatching. 
==Trivia==
*In Magic Online, the counter is colored orange as its considered a negative effect and it shares an icon with Egg, Hatchling, Hoofprint, Incarnation and Prey counters.
==References==