Dimensional Horror

Devoid (This card has no color.)

At the beginning of your first main phase, each opponent exiles the top card of their library. For each of them, choose one that hasn't been chosen this turn —
• Return target nonland card to the top of their library if they exiled a blue card.
• They discard two cards if they exiled a black card.
• Destroy target Vehicle they control if they exiled a red card.
{bull} Dimensional Horror gains +5/+0 until end of turn if they exiled a green