Others, like blacks relationship with mana acceleration, have undergone a surprising amount of change in terms of how many cards they receive with the ability to generate extra black mana and how comparatively restrictive they are versus a card like Dark Ritual, one of the first and strongest go-tos for mana acceleration during Magics early years
Its an instant important with Gemstone Caverns in the sideboard and with other one mana reactive cards ready to be cast
However, it can be tough to decide when its best to attack a Planeswalker and when to attack their controller instead
The trick to designing the effects for entwine is that you have to make them such that they have synergy when combined
For new players, this can make knowing how to create a standard format deck a bit daunting
If the creature with mentor leaves the battlefield with the mentor ability on the stack, use its power as that creature last existed on the battlefield to determine whether the target creature has lesser power