most expensive mtg doctor who cards Duggan, Private Detective Price & Card Details — you may exile a card from your hand with a number of time counters on it equal to its mana value The 10 Cards Everybody Wants

Wizards of the Coast (October 18, 2023)

Isshin doubles the effects of attack triggers, which allows your token-creating attackers to produce even more creatures

A flash-able walker of the planes is strong since they cannot be attacked by foes for a full round, and you can still user her ability once

This design allows WotC to print powerful, complex cards for Constructed at higher rarities so they dont unbalance the Limited format

Great in control too where the extra cost over Wall of Omens is well worth it for the one power and Slight of Hand effect although typically played together for the redundancy despite different costs