It can save you by bouncing three creatures before they attack, or it wins the game by bouncing three blockers before your turn, or some combination thereof
Drop this on turn 4 with a 2-mana answer waiting, pass through turn 5, and you quickly turn the tide
Whether it's the lone poison counter added to a random player earlier in the match or a +1/+1 counter on a creature that has grown out of control, Inexorable Tide can turn plenty of games in your favor just by being out
Speaking of Palinchron, its also very easy for a mono-blue deck to find ways to go infinite with its mana, which can translate to infinite blink effects, card draw, tapping down all your opponents creatures with Thassa, and other extremely convenient side benefits that can set you up to win the game
Enhance your game and protect your cards in style
On arrival you'll mass bounce all non-Deep-Sea dorks - great tempo