Unlike Hearthstone, which only allows players 30 cards, Legends offers up anywhere from 50 cards, which is the minimum to use a deck, to 70, the max
What salt-inducing cards are actually good for the format
Ghostly Prison does a great job getting to the late game by making opponents choose between attacking and casting spells and every player wants to cast spells
2005-10-01 Planeswalkers will enter the battlefield with double the normal amount of loyalty counters
You get Wildcards by opening boosters, competing in events, and winning games to beat your daily and weekly challenges - so if you're short on Wildcards for the shiny new Arena deck you want to build, the best thing to do is get playing with the decks you already have
Using this with a card like Irenicuss Vile Duplication can create incredibly explosive board states