Warp is an alternative cost from Edge of Eternities. A permanent spell cast from your hand for its warp cost is exiled at the beginning of the next end step, and its owner can cast that card from exile on a later turn for its normal cost.
Warp gives permanents a temporary, often cheaper first appearance while setting up another cast later. Exile-matters cards and enter-the-battlefield abilities, such as Haliya’s, naturally appreciate getting multiple uses from the same card.
