
As an additional cost to cast this spell, you may choose a creature type and beholdbeholdExile an Elf you control or an Elf card from your hand. two creatures of that type.
Search your library for a creature card with mana valuemana valueThe total amount of mana in a card's cost, ignoring colour. A card costing has mana value 4. X counts as 0 except on the stack. X or less, reveal it, put it into your hand, then shuffle. If this spell's additional cost was paid and the revealed card is the chosen type, put that card onto the battlefield instead of putting it into your hand.
Hover an underlined rule to see what it means.
Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.