Combos with Altered Ego

1. Cast Altered Ego by paying its mana cost, choosing to have it enter the battlefield as a copy of Felidar Guardian
2. When Altered Ego enters the battlefield, it triggers, blinking Felidar Guardian.
3. When Felidar Guardian enters the battlefield, it triggers, blinking Altered Ego. Choose to have Altered Ego enter the battlefield as a copy of Felidar Guardian.
4. Repeat from step 2.

1. Cast Altered Ego by paying {3}{G}{U}, choosing to have it enter the battlefield as a copy of Enduring Scalelord with a +1/+1 counter on it.
2. Enduring Scalelord triggers, putting +1/+1 counter on itself.
3. Altered Ego triggers, putting +1/+1 counter on itself.
4. Repeat from step 2.

1. Activate Kiora's Follower by tapping it, targeting Altered Ego.
2. Illusionist's Bracers triggers, copying Kiora's Follower's ability.
3. Resolve both Kiora's Follower abilities, untapping Altered Ego and another permanent you control.
4. Activate Altered Ego by tapping it, untapping Kiora's Follower.
5. Repeat.

1. Cast Altered Ego by paying its mana cost, choosing to have it enter the battlefield as a copy of Wispweaver Angel
2. When Altered Ego enters the battlefield, it triggers, blinking Wispweaver Angel.
3. When Wispweaver Angel enters the battlefield, it triggers, blinking Altered Ego. Choose to have Altered Ego enter the battlefield as a copy of Wispweaver Angel.
4. Repeat from step 2.

1. Activate Kiora's Follower by tapping it, targeting Altered Ego.
2. Deeproot Pilgrimage triggers, creating a 1/1 Merfolk creature token.
3. Resolve the Kiora's Follower ability, untapping Altered Ego.
4. Activate Altered Ego by tapping it, targeting Kiora's Follower.
5. Deeproot Pilgrimage triggers, creating a 1/1 Merfolk creature token.
6. Resolve the Altered Ego ability, untapping Kiora's Follower.
7. Repeat.

1. Cast Altered Ego by paying its mana cost, choosing to have it enter the battlefield as a copy of Bladewing.
2. Put Bladewing into your graveyard due to the legend rule.
3. Altered Ego's enter-the-battlefield ability triggers, returning Bladewing from your graveyard to the battlefield.
4. Put Bladewing into your graveyard due to the legend rule.
5. Bladewing's enter-the-battlefield ability triggers, returning it from your graveyard to the battlefield.
6. Repeat from step 4.

Activate Altered Ego by paying {1}{U}, shuffling Altered Ego into your library and milling your entire library due to it not having a card named Mirror-Mad Phantasm in it.

1. Cast Altered Ego by paying {7}{G}{U}, causing it to enter the battlefield as a copy of Sage of Hours with five +1/+1 counters on it.
2. Activate Altered Ego by removing all +1/+1 counters from it, causing you to take an extra turn after this one.
3. Activate Temur Sabertooth by paying {1}{G}, returning Altered Ego to your hand from the battlefield.
4. Repeat each turn.

1. Activate Forensic Researcher by tapping it, targeting Altered Ego.
2. Deeproot Pilgrimage triggers, creating a 1/1 Merfolk creature token.
3. Resolve the Forensic Researcher ability, untapping Altered Ego.
4. Activate Altered Ego by tapping it, targeting Forensic Researcher.
5. Deeproot Pilgrimage triggers, creating a 1/1 Merfolk creature token.
6. Resolve the Altered Ego ability, untapping Forensic Researcher.
7. Repeat.

1. Cast Altered Ego by paying {7}{G}{U}.
2. Chulane triggers, causing you to draw a card and allowing you to put a land onto the battlefield from your hand.
3. Resolve Altered Ego, causing it to enter the battlefield as a copy of Sage of Hours with five +1/+1 counters on it.
4. Activate Altered Ego by removing all +1/+1 counters from it, causing you to take an extra turn after this one.
5. Activate Chulane by paying {3} and tapping it, returning Altered Ego to your hand from the battlefield.
6. Repeat each turn.

1. Cast Altered Ego by paying {7}{G}{U}, causing it to enter the battlefield as a copy of Sage of Hours with five +1/+1 counters on it.
2. Activate Altered Ego by removing all +1/+1 counters from it, causing you to take an extra turn after this one.
3. Activate Kogla by paying {1}{G}, returning Altered Ego to your hand from the battlefield.
4. Repeat each turn.

1. Activate Grim Poppet by removing a -1/-1 counter from it, putting a -1/-1 counter on Altered Ego.
2. Hapatra triggers, creating a creature token.
3. Activate Altered Ego by removing a -1/-1 counter from it, putting a -1/-1 counter on Grim Poppet.
4. Hapatra triggers, creating a creature token.
5. Repeat.

1. Activate Grim Poppet by removing a -1/-1 counter from it, putting a -1/-1 counter on Altered Ego.
2. Nest of Scarabs triggers, creating a creature token.
3. Activate Altered Ego by removing a -1/-1 counter from it, putting a -1/-1 counter on Grim Poppet.
4. Nest of Scarabs triggers, creating a creature token.
5. Repeat.

1. Activate Grim Poppet by removing a -1/-1 counter from it, putting a -1/-1 counter on Altered Ego.
2. Flourishing Defenses triggers, creating a creature token.
3. Activate Altered Ego by removing a -1/-1 counter from it, putting a -1/-1 counter on Grim Poppet.
4. Flourishing Defenses triggers, creating a creature token.
5. Repeat.

1. Cast Altered Ego by paying its mana cost, choosing to have it enter the battlefield as a copy of Abdel Adrian.
2. Put the original Abdel Adrian into your graveyard due to the legend rule, causing Karmic Guide to return to the battlefield from exile.
3. Karmic Guide and Altered Ego's abilities trigger.
4. Resolve the Altered Ego ability, choosing to exile Karmic Guide until Altered Ego leaves the battlefield and creating a 1/1 Soldier creature token.
5. Resolve the Karmic Guide trigger, returning Abdel Adrian from your graveyard to the battlefield.
6. Put Altered Ego into your graveyard due to the legend rule, causing Karmic Guide to return to the battlefield from exile.
7. Karmic Guide and Abdel Adrian's abilities trigger.
8. Resolve the Abdel Adrian ability, exiling Karmic Guide until Abdel Adrian leaves the battlefield and creating a 1/1 Soldier creature token.
9. Resolve the Karmic Guide trigger, returning Altered Ego from your graveyard to the battlefield as a copy of Abdel Adrian.
10. Repeat from step 2.