Every Kindred (focused on a creature type) deck should think about running this, and especially ones where you want to run a critical mass, plus they have low casting costs
Polukranos, Engine of Ruin adds lifelink to the mix and grows to 6/6, plus it gives you Hydra tokens when it and your other nontoken hydras die
You can add up to four regular Puppy cards to your deck, but with Dalmatian Puppy cards, theres no limityou can add up to 99
FromTheShire: Turning all of your spells into cantrips for an extra blue seems really solid, especially since it also lets you dig 2 cards deeper with the scry to find that key card you need to continue going off
Oh, they can be bounced, but they are aggressively costed and come right back
Bruna, the Fading Light In the set Eldritch Moon, Bruna and her sister Gisela were mighty angels that fought against the Eldrazi when it entered the plane of Innistrad