Rya, Manor's Envoy

At the beggining of combat in your turn, another target creature you control has
+1/+1 and Haste.
At the beggining of your upkeep, if you control a creature with power 4 or greater, transform Rya, Manor's Envoy.
'I am Rya, in the service of Lady Tanith of the Volcano Manor. I seek stalwart Tarnished who might join our house.'