Teferi, Master of Time (275) [Core Set 2021] SWSH124 where X is Esper Sentinel's

where X is Esper Sentinel's power

you may sacrifice an artifact

What I wouldn't give to tackle an equation like that

Set: Streets of New Capenna Commander Type: Legendary Creature — Sphinx Rogue Rarity: Mythic Cost: {3}{W}{U}{B} Flying

you and an opponent each reveal the top card of your respective libraries

Teferi, Master of Time (275) [Core Set 2021] SWSH124 where X is Esper Sentinel'sSet: Core Set 2021 Type: Legendary Planeswalker Teferi Rarity: Mythic Cost: {2}{U}{U} You may activate loyalty abilities of Teferi, Master of Time on any player's turn any time you could cast an instant. +1: Draw a card, then discard a card. 3: Target creature you don't control phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.) 10: Take two extra turns after this one.