UUD
Uktabi Drake. It has haste, so...
Both attack. Blocks?
boogiepop: 18
Hand: 4
Library: 30
Battlefield:
(U,U,T) Forest x3
(T) Nessian Courser (3/3)
(T) Uktabi Drake (2/1, flying, haste, echo: 1GG)
Mogg Cannon (Tap: Target creature you control gets +1/+0 and gains flying until end of turn. Destroy that creature at the beginning of the next end step.)
Graveyard:
Exile:
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turgy22: 19
Hand:5
Library: 29
Battlefield:
(UU) Swamp x2
(U) Island x1
(U) Tolaria West (T: Add U; Tolaria West enters the battlefield tapped; Transmute: 1UU)
(T) Mourning Thrull (1/1; Flying; Lifelink or something very much like it.)
(S) Tethered Skirge (2/2; Flying; Whenever this becomes targeted, I lose 1 life. Please don't target it.)
Graveyard:
Exile: