Alexa, knight of Eldraine

Haste, first strike , convoke
When Alexa, Knight of Eldraine attacks up to X
other Humans and/or knights you control get
+x/+x until end of turn. X is equal to how many
times Alexa, Knight of Eldraine has been cast
from the command zone.
Alexa, Knight of Eldraine's power
is equal to 2 +X