The Battlefield

Automated Assembly Line
Gonti's Aether Heart
Izzet Generatorium
AI DraftFeb 26, 2026

Automated Assembly Line + Gonti's Aether Heart + Izzet Generatorium

Overview
Izzet Generatorium’s replacement effect increases every event that would give you one or more {E}; so Automated Assembly Line’s triggered “you get {E}” will give you 2 {E} instead, and Gonti’s Aether Heart’s triggered “you get {E}{E}” will give you 3 {E} instead (Generatorium must be controlled by the same player who would get the energy). Gonti’s Aether Heart’s enter-the-battlefield trigger fires for each artifact that enters under your control (including itself) and simultaneous-entry situations are handled per event rules . The replacement from Izzet Generatorium applies to each “would get” event separately and changes the number of energy counters actually put onto that player’s score [Ruling 2024-03-08].
Step 1
Start with you controlling Automated Assembly Line, Gonti's Aether Heart, and Izzet Generatorium (all under the same player).
Step 2
Gonti's Aether Heart entering the battlefield (or any other artifact entering) causes its triggered ability "Whenever Gonti's Aether Heart or another artifact you control enters, you get {E}{E}." That triggered ability is put on the stack .
Step 3
When that triggered ability resolves, it would put two {E} onto you. Izzet Generatorium’s static replacement effect reads "If you would get one or more {E}, you get that many plus one {E} instead," so it replaces that event; instead of getting 2 you get 3 {E} (apply the replacement when the event of "getting energy counters" would happen) [Ruling 2024-03-08].
Step 4
If multiple artifacts enter simultaneously, Gonti's Aether Heart’s ability will trigger for each artifact that entered under your control; each trigger’s effect to give you {E}{E} is a separate "you get" event and each is replaced by Izzet Generatorium independently .
Step 5
During combat, if one or more artifact creatures you control deal combat damage to a player, Automated Assembly Line’s triggered ability "Whenever one or more artifact creatures you control deal combat damage to a player, you get {E}." triggers once for that event (the text "one or more" means the trigger is a single trigger for the event of artifact creatures you control dealing combat damage to a player) .
Step 6
When that Assembly Line trigger resolves it would put 1 {E} onto you; Izzet Generatorium replaces that with 2 {E} (1 + 1) when the event of getting energy happens [Ruling 2024-03-08].
Step 7
If you then pay energy (for example, pay {E}{E}{E} to create the Robot token from Automated Assembly Line or pay eight {E} and exile Gonti's Aether Heart to take an extra turn), paying energy means you lose energy counters and counts as paying/losing {E} for any effects that care about how much energy you have paid or lost this turn [Ruling 2024-03-08].
Resolution
When you would get energy from Automated Assembly Line or from Gonti's Aether Heart, Izzet Generatorium (if it applies to that player) replaces each "you get" event with "you get that many plus one" so: Assembly Line's single "you get {E}" becomes you getting 2 {E}; Gonti's Aether Heart's "you get {E}{E}" becomes you getting 3 {E}. Gonti's Aether Heart triggers for each artifact entering the battlefield under your control, including itself ; if multiple artifacts enter simultaneously each appropriate trigger is put on the stack (see event grouping guidance) . The energy counters created or lost count normally for paying costs and for conditions that look at how many {E} you've paid or lost this turn [Ruling 2024-03-08].
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