What does it mean when a card has two Faction Symbols at the top of the card to the left of the cost?
Two faction symbols to the right of cost?
This is known as 'Steadfast'.
From the Core Rules --
Steadfast
Some cards have faction symbols in their title. These symbols are part of the card’s cost. These new cards are know as Steadfast cards. When a player drains a domain in order to pay the resource cost of playing a Steadfast card, he must have at least that many resources on the total number of domains he controls (and make a resource match as normal).
See also the example in the rulebook on page 12.
Thanks!