Dur Neh Viir

(A Thu'um can have a maximum of 3 soul counters
on it.)
{2}: Put a soul counter on Dur Neh Viir. Activate
this ability only during your turn
and only once each turn.
{4}{b}: Create Durnehviir, a legendary 6/6
black Dragon creature token with flying and
trample. Activate this ability only if Dur Neh
Viir has 3 soul counters on it.