Magar of the Magic Strings + Rise of the Eldrazi + Psychic Frog

Magar of the Magic Strings

Rise of the Eldrazi

Psychic Frog

How it works

1. Activate Psychic Frog by discarding Rise of the Eldrazi.
2. Activate Magar by paying 1, noting Rise of the Eldrazi and putting it face down on the battlefield as a 3/3 creature.
3. During your next turn, deal combat damage to an opponent using the 3/3 creature that has Rise of the Eldrazi noted.
4. The creature triggers, casting a copy of Rise of the Eldrazi without paying its mana cost.
5. Resolve the Rise of the Eldrazi copy, causing you to take an extra turn after this one.
6. Repeat from step 3 during each turn.