Because intimidate meant that a creature could only be blocked by an artifact creature or a creature that shared a colour with it, games including the intimidate keyword became very swingy
In this aspect, they can be synergistic: Gaining life can be one way to buy yourself time to put the drawn cards to good use
The cards were also stamped with the player's autograph
Sapphire/Steel decks and Ruby/Sapphire decks have both appeared in numerous tournament finals dating back as early as the game's second set

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