Ravozir Sumnar

Trample

Pay D6 life: Sumnar gets +X/+0 where X is the life
paid this way. Activate only once on each of your
turns
{x}: Monstrosity X. You may Activate this Ability
only if a rogue or a Legendary artifact is on your battlefield. When Sumnar becomes monstrous it
becomes a horror in addition to its other types.