I really love the mechanic "Cascade" and I wanted a deck that abuses it. I wanted a fun deck that at the same time could hold its own and win games. The deck also has 4x Shardless Agent, 1x Etherium Horn-Sorcerer, and 2x Illusory Angel.
Your early game is spent mana ramping out your colors. Sylvan Ranger, Coiling Oracle, Farhaven Elf, and Evolving Wilds are essential for this purpose. Ideally, you want to have out 2 Forests, 2 Mountains, an Island, and a Plains and you can cast every card in your deck. The most expensive card (mana wise) is Etherium Horn Sorcerer, so you know that the first spell you run into cascading is coming into play. Blade Splicer, Illusory Angel, and Man-O-War give you extra creatures and removal options (also man-o-war can bounce your own cascade creatures for reuse). Speaking of which, Shardless Agent, Bloodbraid Elf, and Etherium Horn Sorcerer are your cascaders. Faerie Imposter, Kor Skyfisher, and Man-O-Wars can bring those cascaders back to your hand for more cascading! So with all these creatures, what's the win condition? Glad you asked. Furystoke Giant can turn your army into a one shot kill, and is abusable with the return back to hand effects. Revillark is useful for reanimating your lost creatures back into play, and also abusable with return back to hand effects. The one card that breaks the deck has to be Predatory Rampage. I've explored options with Overrun and Overwhelming Stampede, and found Overrun is too mana restrictive in a 4 color deck, and Overwhelming Stampede isn't as useful when the creatures don't get over 3-4 power. Predatory Rampage allows my army to not only get bigger, but also forces my opponent to block and lose all their creatures potentially, and if they don't, then your army gets through for lethal (if not after blocks are assigned anyway). Even if you lose some creatures, the deck can recover from losses very quickly. Try this deck out, and you'll have a fun time.