Some players simply don't play any single target removal and bank on other players to police the table
Planeswalkers, by allowing you to activate abilities that have spell-like effects for free, generate virtual card AND mana advantage with each activation
Quina, Qu Gourmet seems like a fine addition to token decks, though I dont know that its actually all that good in dedicated frog decks
Ragnarok, Divine Deliverance Rarity: Uncommon TYPE: Legendary Creature SUBTYPE: Beast Avatar CMC: 7 Mana cost: USD: $0.00 EUR: 0.00 TIX: 0.00 EDHREC RANK: - (7/6) Vigilance, menace, trample, reach, haste When Ragnarok dies, destroy target permanent and return target nonlegendary permanent card from your graveyard to the battlefield
Also that shield is NOWHERE near that big in game
For starters, they curve perfectly, as you ideally play Connections on four to get a card instantly