Dovescape, Displacer Kitten, Spellbook Seeker // Careful Study, and Phyrexian Altar

Prerequisites

• Dovescape on the battlefield
• Displacer Kitten on the battlefield
• Spellbook Seeker // Careful Study in hand
• Phyrexian Altar on the battlefield
• available

Steps

1. Cast a copy of the prepared spell by paying its mana cost
2. When you cast that spell, Displacer Kitten and Dovescape trigger
3. Resolve the Dovescape trigger, countering the prepared spell and creating a number of 1/1 flying Bird creature tokens equal to its mana value
4. Resolve the Displacer Kitten trigger, blinking Spellbook Seeker // Careful Study, which enters prepared
5. Activate Phyrexian Altar by sacrificing a Bird token, adding one mana of any color
6. Repeat

Results