If you can keep it, and it comes with build in protection, you can lock down a creature pretty nicely
Ulamog, the Defiler Yes eldrazi are powerful, but wow, it's like each effect on Ulamog, the Defiler takes it up a rarity
While Magic: The Gathering | Marvel Super Heroes doesn't explicitly hinge on +1/+1 counters, Streets of New Capenna , where connive originated, had a counters subtheme that bridged connive (the white-blue-black Obscura mechanic) and shield counters (the green-white-blue Brokers mechanic)
If it's a creature, it becomes a copy of The Flood of Mars
Game Night: Free-for-All contains everything you need to challenge friends and family to epic magical battles
Either of these cards blows all semblance of card parity out the window, granting the user so many extra cards and so much card selection as to make it almost impossible for them to lose if they are not killed quickly