Titania, Gaea Incarnate's last ability doesn't have a duration, which means that the land remains a creature indefinitely
Disney have revealed their upcoming trading card game called Lorcana, and although the card game isnt out yet, they have revealed information regarding the card rarities alongside rules, accessories and art
That said, in terms of actual gameplay, it is one of the better current TCGs
Get a glass, you creep
Other cards like Goblin Tunneler and Rogue's Passage that make creatures unblockable are also fairly great options with little investment, with Jumbo Cactuar seeming to pair pretty excellently with both red and green spells respectively
Like with Mana Crypt and Ancient Tomb, you should feel justified in running free spells to protect your investments