Through the Breach (Invocation) [Amonkhet Invocations] URL/Convention Promos Line-Slinger gets +1/+0 for each

Line-Slinger gets +1/+0 for each artifact you control

that is another feat altogether

Urza was the first to understand that the war would not be lost for lack of power

Set: Portal Three Kingdoms Type: Sorcery Rarity: Uncommon Cost: {G} Put target card from your graveyard on top of your library

If a creature card is revealed this way

Through the Breach (Invocation) [Amonkhet Invocations] URL/Convention Promos Line-Slinger gets +1/+0 for eachSet: Amonkhet Invocations Type: Instant Arcane Rarity: Mythic Cost: {4}{R} You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice that creature at the beginning of the next end step. Splice onto Arcane {2}{R}{R} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)