edhseer Commander synergy, explained
Instant
Mana cost: {X}{U}{U}
Look at the top X cards of your library. Put up to two of them into your hand and the rest on the bottom of your library in a random order.
on-cast — puts cards into your hand
Counter target spell unless its controller pays twice {X}.
on-cast —
Causes: you face a dilemma, counter a spell.
Cares about: nothing.
you face a dilemma — 739 cards in the game can cause this (Thassa's Intervention is one).
When Thassa's Intervention poses a dilemma:
an instant is cast — 3,931 cards in the game can cause this (Thassa's Intervention is one).
When Thassa's Intervention is cast:
427 other cards care about it too. These are the ones with the most connections.
anything is cast — 31,128 cards in the game can cause this (Thassa's Intervention is one).
When Thassa's Intervention is cast:
5 other cards care about it too. These are the ones with the most connections.