Reckless Fireweaver

Whenever an artifact you control enters, Reckless Fireweaver deals 1 damage to each opponent.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Whenever one or more artifacts you control enter, Ingenious Artillerist deals that much damage to each opponent.

Defender
Whenever Shield Sphere blocks, put a -0/-1 counter on it.

When Candy Trail enters, scry 2.
{2}, {T}, Sacrifice Candy Trail: You gain 3 life and draw a card.

Whenever you cast a noncreature spell, this creature deals 1 damage to each opponent.

{T}, Sacrifice an artifact: Orcish Vandal deals 2 damage to any target.