[2] His super-human strength varies on how much light he is exposed to and was discovered after his father buried him alive for finding him sexually experimenting with another boy.

[6] He takes to observing the Young X-Men from the shadows, watching them leave to confront Sunspot's Brotherhood of Mutants.

[7] After Blindfold is captured, Graymalkin decides he must rescue her, kill "the Cyclops" and makes unexplained references to Cipher while rambling to himself.

[8] Later, despite her defeating Pierce, Graymalkin is distrusting of Magma, who earlier used her powers to solidify an attacking Dust into glass.

After the team dealt with Pierce, Beast announced that an analysis of Graymalkin's DNA revealed he is not only a mutant, but a member of Charles Xavier's family—from about 200 years in the past.

[4] When anti-mutant protesters led by Simon Trask march in San Francisco in support of Proposition X, Graymalkin and a number of other mutants are part of a pro-mutant rights mob and attempt to stall their demonstration.

When Hellion taunts the protesters, Trask incites a riot and Graymalkin is seen fighting them off alongside Anole and Beast.

Beast lists invulnerability and longevity as additional abilities, which allow him to survive the pressure and cold extremes of being buried alive.