Ratna, Dragon Caretaker

Affinity for Dragons (This spell costs {1} less to
cast for each Dragon you control.)
Ratna, Dragon Caretaker enters the battlefield
with X +1/+1 counters, where X is the number
of Dragons you control.
At the beginning of combat on each turn, target
Dragon you control gets +X/+0 where X is
Ratna's power.