Assault Blackwing - Kunai the Drizzle (DOCS-EN018) - Dimension of Chaos Unlimited

You can Special Summon this card (from your hand) by Tributing 1 "Blackwing" monster. If Summoned this way, it is treated as a Tuner monster. Once per turn: You can target 1 Synchro Monster you control and declare a Level from 1 to 8; it becomes that Level until the end of this turn.