This is a built-in way to reset Gandalf, and in a pinch, you can use it to protect Gandalf from a removal spell

Sort Card Type Swoobat #51Uncommon $0.39 Swoobat #37Rare $0.85 Swoobat #71Rare $0.58 Swoobat #65Uncommon $0.44 Swoobat #72Uncommon $0.20 Swoobat #88Rare $0.63 Swoobat #74Uncommon $0.08 Swoobat #69Uncommon $0.01 Swoobat #33Uncommon $0.08 Swoobat #37Uncommon $0.04 Swoobat #29Uncommon $0.17 Swoobat #27Uncommon $0.14 Swoobat #48Uncommon $0.20 Swoobat #30Uncommon $2.55 Swoobat #28Common $0.75 Swoobat - 034/086 #34Uncommon $0.12 Swoobat - 034/086 (Master Ball Pattern) #34Uncommon $1.39 Swoobat - 034/086 (Poke Ball Pattern) #34Uncommon $0.31 Swoobat - 117/086 #117Art Rare $7.12 Swoobat - 120/086 #120Illustration Rare $14.96 Swoobat (Master Ball Pattern) #37Uncommon $14.07 Swoobat (Poke Ball Pattern) #37Uncommon $0.47 Swoobat - 120/086 #120Illustration Rare $14.96 Swoobat (Master Ball Pattern) #37Uncommon $14.07 Swoobat - 117/086 #117Art Rare $7.12 Swoobat #30Uncommon $2.55 Swoobat - 034/086 (Master Ball Pattern) #34Uncommon $1.39 Swoobat #37Rare $0.85 Swoobat #28Common $0.75 Swoobat #88Rare $0.63 Swoobat #71Rare $0.58 Swoobat (Poke Ball Pattern) #37Uncommon $0.47

For 3 mana, you get to do one of the following: Add a red mana to your mana pool for every card in an opponents hand Exile the top 3 cards of your library and gain the ability to play them during the same turn Do both of the above if your commander is in play Powerful legendary creatures have become increasingly cost effective in recent years, so it is laughably easy to get both effects for 3 mana, which will usually net you 5-7 mana to play your newly accessible cards
Immediately afterwards, all face up cards become that attribute, and any enemy cards with that attribute cannot attack or activate any effects
Cards that require a selection should be resolved according to the difficulty selected
It all just fits so well both thematically and as a card mechanic.I think it will be an incredibly good card, and it has me a bit terrified that my friends will run a copy in their deck