Marshall D. Teech

Wastes walk nonbasic land walk vigilance trample
Other captains' creatures they create get +3/+3
and gain haste. You get a second combat phase.
{4}{t}, black hole, tap 4 target cards.
{x}{t}, rally, create X 3/3 crew member creature
tokens
{4}{t}, controlled wave, deal 3 damage to 4 target creatures