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The price is lower than Serra's Sanctum, but still commands a $100 price tag on TCGPlayer

In short, you only have earned two attacks

Should be an affordable foil that swings above its $$ value

You will want cheaper ramp spells to get you to that five mana earlier though

For example, the main effect would be "When a monster is Summoned, declares an attack or activates its effect, or a card effect is activated that targets a monster on the field: The controller of that monster rolls a six-sided die and applies the result." Then, some of the results could be: "You can Normal Summon 1 extra monster this turn" (think of a D&D character randomly dragging a friend to a battle with a monster)