Does Humility remove activated abilities from creatures as well as static abilities?

Humility reads: 'All creatures lose all abilities and have base power and toughness 1/1.' The phrase 'lose all abilities' is comprehensive. Under CR 112.1, abilities include activated abilities, triggered abilities, static abilities, spell abilities, and mana abilities. Humility strips every one of these categories from all creatures on the battlefield.

CR 612.1 governs effects that remove abilities. When a continuous effect says a permanent 'loses all abilities,' it removes every ability of every type that the creature currently has. This means a creature under Humility cannot use a tap ability, won't trigger on dealing damage, and loses any static ability like flying or trample.

A key practical consequence: a creature with an activated ability like Prodigal Sorcerer's '{T}: deal 1 damage to any target' loses that ability entirely while Humility is on the battlefield. You cannot activate it because the ability simply no longer exists on the card.

However, be aware of layer interactions (CR 613). If another effect grants a creature an ability after Humility applies in the same layer (layer 6), the granted ability may or may not survive depending on the timestamp or dependency rules. For example, if a subsequent effect gives a creature flying, that creature will have flying even under Humility, because the grant happens later in the same layer.

Concrete example: You control a Thassa, God of the Sea (a creature due to devotion). Humility is on the battlefield. Thassa loses her activated ability '{1}{U}: Target creature you control is unblockable this turn' and her static indestructibility. She also becomes a 1/1. You cannot pay {1}{U} to make a creature unblockable because that ability no longer exists on Thassa.