Displace + Great Whale + Eternal Witness

3-card combo · GU

Verdict

Yes — this 3-card loop generates infinite ETB triggers and infinite mana with as little as seven lands producing 3U.

Cards required: 3
Cheapest stack total: $25.25
Color identity: GU
Popularity: 150 decks
Format: Commander

Buy required cards on TCGplayer

Displace blinks both Eternal Witness and Great Whale simultaneously; Eternal Witness returns Displace to hand, Great Whale untaps up to seven lands to pay for the next cast. The loop lives entirely at sorcery speed and telegraphs itself the moment Great Whale resolves, so any counterspell aimed at Displace or a bounce effect on either creature ends it immediately.

Recipe

How it works

Prerequisites

You control up to seven lands that can tap to produce at least . If you control seven lands that can tap to produce at least , this combo nets infinite mana, and you may blink any other permanent besides Great Whale.

Steps

Activate up to seven lands by tapping them, adding at least .
Cast Displace by paying , blinking Eternal Witness and Great Whale
When Eternal Witness and Great Whale enter the battlefield, their abilities trigger.
Resolve the Eternal Witness trigger, returning Displace from your graveyard to your hand.
Resolve the Great Whale trigger, untapping up to seven lands.
Repeat.

Result

Infinite LTB; Infinite ETB; Infinite storm count; Infinite mana lands you control can produce; Infinite magecraft triggers; Infinite blinking; Infinite landfall triggers; Infinite untap of lands you control

Variations

Cheaper, tighter, alternate lines

Peregrine Drake replaces Great Whale as the untap engine — same function, cheaper to cast at 4U instead of 5UU, and easier to cheat into play off Show and Tell or Temur Sabertooth lines. Ghostly Flicker is a direct Displace substitute that does the same job at the same cost; running both increases redundancy. Once mana goes infinite, Thassa's Oracle or Blue Sun's Zenith closes the game — the loop itself produces no direct damage.