Can you play Carnivorous Snapvine on your turn and respond to its ability with En Garde and Discipline to boost it?

Ruling: Yes, you can play Carnivorous Snapvine on your turn and respond to its trigger ability with En Garde and Discipline to boost it.

Sequence:

• Play Snapvine
• Its trigger goes on the chain
• Hold priority and cast En Garde
• Hold priority and cast Discipline