Riptide

The first effect triggers when the card is played from hand, but does not resolve until after the card has finished being played. You do not put a card in arsenal part-way through playing a card.

The first effect resolves before the played card resolves.

The second effect triggers whenever a trap you control triggers. Traps typically trigger when they resolve and become defending (e.g. “When this defends”), but may also have additional trigger conditions that must be met for the trap to trigger.

Even if the trap’s triggered effect does not affect the gamestate, if the trigger condition is met and it has triggered, then Riptide’s second effect will also be triggered.

Both effects can trigger any number of times each turn, as long as their trigger condition is met.