Ancient Stone Idol

Text:

Flash
This spell costs less to cast for each attacking creature.
Trample
When Ancient Stone Idol dies, create a 6/12 colorless Construct artifact creature token with trample.

Rulings:

• 7/13/2018 Ancient Stone Idol’s cost is reduced for each attacking creature, not just creatures attacking you. It even counts your attacking creatures.
• 7/13/2018 If there are enough attacking creatures, Ancient Stone Idol’s cost can be reduced to <img src="/Handlers/Image.ashx?size=small&amp;name=0&amp;type=symbol" alt="0" align="absbottom" />.
• 7/13/2018 The total cost to cast a spell is locked in before you pay that cost. For example, if you control five attacking creatures, including one you can sacrifice to add <img src="/Handlers/Image.ashx?size=small&amp;name=C&amp;type=symbol" alt="Colorless" align="absbottom" /> to your mana pool, Ancient Stone Idol costs <img src="/Handlers/Image.ashx?size=small&amp;name=5&amp;type=symbol" alt="5" align="absbottom" /> to cast. Then you can sacrifice the creature when you activate mana abilities just before paying the cost, and it still costs only <img src="/Handlers/Image.ashx?size=small&amp;name=5&amp;type=symbol" alt="5" align="absbottom" /> to cast.