Springleaf Drum

{T}, Tap an untapped creature you control: Add one mana of any color.

Banishing Knack

Until end of turn, target creature gains "{T}: Return target nonland permanent to its owner's hand."

Battered Golem doesn't untap during your untap step.
Whenever an artifact enters, you may untap Battered Golem.

Flash
Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
{T}: Target creature gets +1/+0 until end of turn.

Flying
Whenever you cast an artifact spell, you may untap target creature.

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

Whenever you cast a noncreature spell, Kessig Flamebreather deals 1 damage to each opponent.

Silverbluff Bridge enters tapped.
Indestructible
{T}: Add {U} or {R}.

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Draw two cards.