Nergigante, Ebony Terror

Flying, Trample
When Nergigante, Ebony Terror enters the battlefield, destroy all elder dragons. Nergigante, Ebony Terror gets +1/+1 for every creature destroyed that turn.
When Nergigante, Ebony Terror is dealt combat damage, it gets +1/+1.
{2},{b}: Regenerate Nergigante, Ebony Terror.
"Die."