The Thorston Twins

Flying, Menace
Whenever an ability of a creature triggers, it triggers
an additional time.
When The Thorston Twins deal combat damage to
a player or planeswalker, choose one that hasn't been chosen this turn:
• Draw a card, you lose 2 life
• Destroy target artifact, The Thorston Twins deal 1 damage to each other creature
• Proliferate, target opponent gains 2 life