Goblin Welder

Equipped creature gets +1/+2. Whenever an Artificer you control enters, you may attach this Equipment to it. Equip 2 (2: Attach to target creature you control. Equip only as a sorcery.)

When this creature enters, create a 1/1 colorless Thopter artifact creature token with flying. (A creature with flying can't be blocked except by creatures with flying or reach.)

When this creature enters, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. When this creature dies, you may draw a card.

When this creature enters, create four 1/1 colorless Myr artifact creature tokens. Whenever this creature attacks, you may tap X untapped Myr you control. If you do, this creature gets +X/+0 until end of turn and deals X damage to the player or planeswalker it's attacking.

This land enters tapped. T: Add G. T: Put a +1/+1 counter on each green creature that entered this turn.

Indestructible T: Add C.

Jagged-Scar Archers's power and toughness are each equal to the number of Elves you control. T: This creature deals damage equal to its power to target creature with flying.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for 1.) When this creature enters, create two 1/1 colorless Thopter artifact creature tokens with flying.