Hellkite Hatchling

[(nameless one)]

I am having this argument with a buddy and I want to settle this once and for all:

Does Hellkite Hatchling have 1 ability (Devour 1) or 3 abilities (Devour, Flying, Trample)?

Thanks in advance

[cdr]

You're both wrong. It has four abilities if it devoured a creature, or two otherwise.

[Malchar]

Hint: "Hellkite Hatchling has flying and trample if it devoured a creature." is an ability, and it might give additional abilities.