Do passive cost reduction effects (like Rhasa's) and stat modification effects (like Draven's) apply when cards are in zones outside of play (graveyard/deck)?

Ruling: Cost reduction effects and continuous stat modification effects only apply while cards are on the board. When checking costs or stats from other zones like graveyard or deck, only the printed values are used.

Nuances:

• When an effect says "play something from trash with a cost of X or lower," it refers to printed cost only
• Continuous effects that modify stats (like Might) do not apply in zones outside of play