Isshin, Two Heavens as One

Mikaeus enters with X +1/+1 counters on it. T: Put a +1/+1 counter on Mikaeus. T, Remove a +1/+1 counter from Mikaeus: Put a +1/+1 counter on each other creature you control.

You may sacrifice a nontoken white creature rather than pay this spell's mana cost. Until end of turn, your life total can't change, and permanents you control gain hexproof and indestructible.

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) Whenever Thada Adel deals combat damage to a player, search that player's library for an artifact card and exile it. Then that player shuffles. Until end of turn, you may play that card.

UU, T: Gain control of target legendary permanent. (This effect lasts indefinitely.)

T: Target artifact creature's controller sacrifices it. That player may search their library for a noncreature artifact card, put it onto the battlefield, then shuffle.

Destroy all creatures. They can't be regenerated. Draw a card for each creature destroyed this way. Cycling 3BB (3BB, Discard this card: Draw a card.) When you cycle this card, all creatures get -2/-2 until end of turn.

If a red source you control would deal damage to an opponent or a permanent an opponent controls, it deals that much damage plus 2 instead.

You may play an additional land on each of your turns. 4GG, T: Look at the top six cards of your library. You may reveal a creature card with mana value less than or equal to the number of lands you control from among them and put it onto the battlefield. Put the rest on the bottom in a random order.