mtg red standard cards Mono Aggro by MTG-Max - MTGO League Red Sun's Twilight | Phyrexia:

If he's on the field, he'll keep your hand size unlimited, he could work in the 99 or as your Commander

Flying Car Shadowed Caravel Silent Submersible Skyseer's Chariot Smoldering Stagecoach Smuggler's Buggy Smuggler's Copter Smuggler's Copter Subterranean Schooner Surgehacker Mech The Belligerent The Falcon, Airship Restored The Fantasticar The Fire Nation Drill The Indomitable The Lunar Whale The Omenkeel The Prydwen, Steel Flagship The Regalia

Is there much design space left for him now

Perform multiple tests

For seven mana you get an on curve 7/7 with four powerful keywords - flying (evasion), vigilance (very strong in multiplayer swinging at people in the air for Commander Damage and then holding the fort), deathtouch (no one wants to block) lifelink (nice double life swing for that 7 damage.)