Jegantha, the Wellspring + Horde of Notions + Phyrexian Altar + Dynaheir, Invoker Adept

Jegantha, the Wellspring

Horde of Notions

Phyrexian Altar

Dynaheir, Invoker Adept

How it works

1. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs.
2. Activate Phyrexian Altar by sacrificing Jegantha.
3. Activate Horde of Notions by paying , causing you to cast Jegantha from your graveyard without paying its mana cost.
4. Repeat.

This engine relies on the unique mana restriction of Jegantha, the Wellspring being completely bypassed by the color-matching activation cost of Horde of Notions, which casts Jegantha right back from the graveyard for free. Phyrexian Altar acts as the sacrificial outlet that turns Jegantha into the exact five colored mana needed to fuel the Horde, while Dynaheir, Invoker Adept sits on the board granting haste and standing ready to double up on other activated abilities when needed. By looping these permanents together, you generate an endless storm of creature sacrifices, deaths, and entries that can overwhelm an opponent in a single explosive turn.