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{T}: Add {U}.
Channel — {3}{U}, Discard Otawara, Soaring City: Return target artifact, creature, enchantment, or planeswalker to its owner's hand. This ability costs {1} less to activate for each legendary creature you control.
Discarding the card is part of the cost to activate a channel ability.
If a channel ability requires a target, you may not activate it without a target just to discard the card.
