Fiery Portal

{t}: Add {r}{r}, {r}{b}, {r}{g}, or {r}{w}.
{x}{x}{r}, {t}: Create X X/X red Jackal Zombie
tokens.
If X is 1 they have haste.
If X is 2 they have first strike.
If X is 3 they have deathtouch.
If X is 4 or more they have all of the above.
"Doomed citizens enter that portal, and only
the corpses return."