Requires

Approach of the Second Sun must be in the library. Sunbird's Invocation must be on the battlefield. God-Eternal Kefnet must be on the battlefield. Penance must be on the battlefield. Mana needed:

Steps

1. Move to your draw step, drawing Approach of the Second Sun and revealing it due to God-Eternal Kefnet's ability.
2. Resolve God-Eternal Kefnet's trigger, copying Approach of the Second Sun and casting the copy from your hand by paying .
3. Sunbird's Invocation triggers.
4. In response, activate Penance by putting Approach of the Second Sun on top of your library, declining to choose a source.
5. Resolve the Sunbird's Invocation trigger, revealing the top seven cards of your library, casting Approach of the Second Sun without paying its mana cost, then putting the rest of the revealed cards on the bottom of your library.
6. Resolve Approach of the Second Sun, putting it back into your library seventh from the top and gaining you 7 life.
7. Resolve the remaining copy of Approach of the Second Sun.

Results