Monster Reincarnation lets you re-use your control, I dont think it matters too much if you go -1 when you have answers to any of your opponents cards, hand or field, or in battle
While some people decried the inclusion of Demon and demonic imagery in MTG, fans embraced the creature type, and, as such, some Demon cards are worth a hefty sum on the secondary market due to a combination of scarcity and intriguing, devilish designs that are sure to tempt you with power and riches
"Strength" is slightly debatable - a card being Water-type alone doesn't make it stronger - though you could argue the fact there are so many equally strong Water-type decks, more than any other type by some margin, is the definition of strength
Its a little slow, though, unless you can put +1/+1 counters on it quicker