Activate Phyrexian Altar by sacrificing Mogis's Warhound, adding {R}.
Mogis's Warhound leaves the battlefield, causing Nyxborn Shieldmate to become an enchantment creature.
Dawn Evangel triggers, returning Mogis's Warhound from your graveyard to your hand.
Cast Mogis's Warhound for its bestow cost by paying {R}, attaching it to Nyxborn Shieldmate.
Activate Phyrexian Altar by sacrificing Nyxborn Shieldmate, adding {W}.
Nyxborn Shieldmate leaves the battlefield, causing Mogis's Warhound to become an enchantment creature.
Dawn Evangel triggers, returning Nyxborn Shieldmate from your graveyard to your hand.
Cast Nyxborn Shieldmate for its bestow cost by paying {W}, attaching it to Mogis's Warhound.
Repeat.

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite creature sacrifice triggers

Infinite storm count

Dawn Evangel

Phyrexian Altar

Mana Matrix

Nyxborn Shieldmate

Mogis's Warhound

Activate Phyrexian Altar by sacrificing Mogis's Warhound, adding {R}.
Mogis's Warhound leaves the battlefield, causing Nyxborn Rollicker to become an enchantment creature.
Dawn Evangel triggers, returning Mogis's Warhound from your graveyard to your hand.
Cast Mogis's Warhound for its bestow cost by paying {R}, attaching it to Nyxborn Rollicker.
Activate Phyrexian Altar by sacrificing Nyxborn Rollicker, adding {R}.
Nyxborn Rollicker leaves the battlefield, causing Mogis's Warhound to become an enchantment creature.
Dawn Evangel triggers, returning Nyxborn Rollicker from your graveyard to your hand.
Cast Nyxborn Rollicker for its bestow cost by paying {R}, attaching it to Mogis's Warhound.
Repeat.

Nyxborn Rollicker

Combos with "Mogis's Warhound"