Idol of Oblivion I'd normally say Idol of Oblivion should be reserved for token decks, but so many decks can produce incidental tokens these days, so the Idol probably has more homes than it might seem
Legality depends on the tournament format -- Squall Drifter can be legal in some formats and banned or restricted in others
Additionally, if an opponent would target their own permanents with beneficial effects, a player can cause Spellskite to receive these benefits instead, meaning it often must be answered as quickly as possible
For six mana (two blue plus four), you can cast a 6/7 flying dragon that, upon entering the battlefield, returns two permanents to their owner's hand
What cards are similar to Sign in Blood
In form and function, this an Amber/Sapphire all-Disney Princess deck, where each princess may help others, with stacking abilities