Magic designers do this when they tie certain abilities to specific colors, give a card a multicolor cost, or add extra colored mana pips to make a spell more difficult to cast
Each of the three options are great and keep opponents on their heels
Save for one block in Pre-Modern era and some new cards in the Nostalgia/Callback Time Spiral Block, there was not a lot of morph stuff
Now, your opponent isnt going to sit back and let you activate Garruk over and over again without putting up a fight
Against: Much like Enlightened Tutor, Mystical Tutor has the downside of being restricted to instants and sorceries, while also only putting something on top of your library rather than into your hand
The former will have a pair of cards for both the first game and its sequel, while the latter will cover both the original Greek storyline and the reboots Norse one