Wispering Melody

Defender, Flying, Hexproof
When this card enters,or at the beginning of your upkeep, create a Clue token.
The mana cost for sacrificing clue cost {1} less to cast.
{t}: Until end of turn, all Clue tokens you control become 2/2 creatures with flying. If those tokens would leave the battlefield this turn, exile them instead and draw a card.

When this card leaves the battlefield, you may sacrifice any number of Clue tokens you control. If you do, draw X cards, where X is the number of Clue tokens sacri